Bus Conversions dot Com Bulletin Board
August 29, 2014, 11:05:13 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: New ownership began September 1st 2012!  Please send any comments to info@busconversions.com
   Home   Help Forum Rules Search Calendar Login Register BCM Home Page Contact BCM  
Pages: 1 2 [All]   Go Down
  Print  
Author Topic: NO Blinkie  (Read 1896 times)
viking1
Viking
Jr. Member
**
Offline Offline

Posts: 74





Ignore
« on: August 31, 2011, 12:01:13 PM »

Any one have any advice on where to start. I got running lights and headlights, but no blinkers and no brake lights. And no wiring diagram. They worked just fine last time I used the bus. I checked the bulbs, they all seem to be good.

MCI 102C3
Logged

Price is what you pay.  Value is what you get
loosenut
Confidently Ignorant
Sr. Member
****
Offline Offline

Posts: 407




Ignore
« Reply #1 on: August 31, 2011, 12:20:29 PM »

Can you hear your blinker even though they don't light?  If not it is probably the flash unit.  Mine is in the chassis main electrical box.

Mike
Logged

Sold 85 Neoplan 33ft 6V92ta, sadly busless
Lin
Hero Member
*****
Offline Offline

Posts: 4543

1965 MC-5a




Ignore
« Reply #2 on: August 31, 2011, 01:05:58 PM »

You really do want to get a manual for your bus which includes wiring diagrams.  It is indispensable.
Logged

You don't have to believe everything you think.
viking1
Viking
Jr. Member
**
Offline Offline

Posts: 74





Ignore
« Reply #3 on: September 07, 2011, 07:33:28 PM »

So Ive been doing a little trouble shooting and getting very frustrated. All the wires are intact, I have running lights and headlights but no blinkers, no hazards and no brake lights. Any one have any advice.
Logged

Price is what you pay.  Value is what you get
viking1
Viking
Jr. Member
**
Offline Offline

Posts: 74





Ignore
« Reply #4 on: September 07, 2011, 07:34:17 PM »

and no blinkie sound and no indication on the dash either
Logged

Price is what you pay.  Value is what you get
viking1
Viking
Jr. Member
**
Offline Offline

Posts: 74





Ignore
« Reply #5 on: September 07, 2011, 07:35:56 PM »

if it is the flash unit, how would the brake lights be tied in with that???  HELP.. Got big trip coming up and no brake lights or blinkers... HELP
Logged

Price is what you pay.  Value is what you get
John316
Hero Member
*****
Offline Offline

Posts: 3222

MCI 1995 DL3, DD S60, Allison B500.




Ignore
« Reply #6 on: September 07, 2011, 07:49:32 PM »

Viking1 (please sign your first name at least....),

I feel your pain. BTDT, just not with this exact situation.

How much do you know about your bus electronics? Not much, I take it. I am just going to throw some ideas out, but I have no idea what your bus is like.

I would start by looking to see if you can figure out if both brake lights and turn signals are on the same auto reset breaker/fuse (probably auto reset breaker). Otherwise, I would see if you can figure out the power source. Our J box has a bit of a diagram on the door. I can figure a lot of things out by that.

Otherwise, I agree with the others. Get da book! We paid serious $$$ for ours from MCI. They have sure been worth it, though.

FWIW

John
Logged

MCI 1995 DL3. DD S60 with a Allison B500.
robertglines1
steam nut
Hero Member
*****
Offline Offline

Posts: 3991





Ignore
« Reply #7 on: September 08, 2011, 05:35:22 AM »

about 7 weeks ago some one with a older MCI had similar problems. after much testing changed turn signal relay and all was good.  also basic thing is verify ground at relay. ck power to the turn signal relay 
Logged

Bob@Judy  98 XLE prevost with 3 slides --Home done---last one! SW INdiana
bevans6
Hero Member
*****
Offline Offline

Posts: 4596


1980 MCI MC-5C




Ignore
« Reply #8 on: September 08, 2011, 06:22:55 AM »

My feeling is that without a schematic this will be very hard to chase down.  On my earlier MCI the turnsignals and the brake lights are completely separate circuits, only thing in common is they are both fed off the main buss.
Logged

1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Spicer 8844 4 speed Zen meditation device
Vintage race cars -
1978 Lola T440 Formula Ford
1972 NTM MK-4 B/SR
AndyG
Jr. Member
**
Offline Offline

Posts: 82




Ignore
« Reply #9 on: September 08, 2011, 07:41:12 AM »

Start with the simple stuff first.  You have already checked the bulbs.  Now check the fuses/breakers the flasher system may have a seperate fuse.  Fuses OK? Now check the flasher unit itself.... 

if it is the flash unit, how would the brake lights be tied in with that???  HELP.. Got big trip coming up and no brake lights or blinkers... HELP

Sometimes, seemingly unrelated functions are joined together on vehicles.  It is possible that the brake lights and flashers could be connected in some way or at least use a common fuse.  You should see the crazy stuff that happens on a car when the headlight switch goes bad.  Even if you get the flashers working you will still want to get that maintenance manual to keep in the coach.  It will pay for itself many times over when you need to diagnose something like this. 
Logged
viking1
Viking
Jr. Member
**
Offline Offline

Posts: 74





Ignore
« Reply #10 on: September 08, 2011, 08:21:09 AM »

Thanks for all the great advise, Anyone know where the fuses and the flashers are? are they under the driver window in that compartment? lots of wires and things in there.


Thomas
Logged

Price is what you pay.  Value is what you get
eddiepotts
Sr. Member
****
Offline Offline

Posts: 446





Ignore
« Reply #11 on: September 08, 2011, 10:53:39 AM »

I am kind of ashamed to read this statement like this right here.
Quote
I agree with the others. Get da book! We paid serious $$$ for ours from MCI
From all the help people get here we are down to answers like this. Thomas has 50 post since 2008 and this is what he gets for help? He does not seem like a burdon to me. Thomas I wish I could help more. I know on my Prevost every wire is numbered and it makes it easy to trace to the source of power. I have a power panel under my drivers window that has power to the running lights but I would have to look and see if the brake light were being powered from the panel box in the engine compartment. My start stop switch is in the same box. I know my trailer lights are coming from there so it has to have some tie in. I am guessing your not getting front blinkers or steady light either and you checked power to brake lights and not just the way the bulbs look. I would be looking at power at your brake light switch. Are you using a volt meter or just flipping switches to see if stuff works. Give more detail of what you have checked, how you checked and how deep your into it.
« Last Edit: September 08, 2011, 11:52:12 AM by eddiepotts » Logged
robertglines1
steam nut
Hero Member
*****
Offline Offline

Posts: 3991





Ignore
« Reply #12 on: September 08, 2011, 11:10:06 AM »

two compartments on that side If memory serves me rite. the 8 I had the relay was in the bottom one on the front. Ck for wire diagrams glued to doors.  Ch the ford style relays in box to make sure power is traveling thru them (big poles) when switch is on. Again been awhile since I fooled with MCI. Had one go bad once and killed power from switch(ign) to some functions. Headlights are prob 12 volt so fed thru differant system. turn and clearance&brake are 24 volt. verify 24 volt ground    Bob
Logged

Bob@Judy  98 XLE prevost with 3 slides --Home done---last one! SW INdiana
bevans6
Hero Member
*****
Offline Offline

Posts: 4596


1980 MCI MC-5C




Ignore
« Reply #13 on: September 08, 2011, 11:41:08 AM »

To be honest if I thought my MC-5C schematic was close I would post it.  That bus is a different generation.  The MC-9 schematics are on-line, http://www.buses101.com/mc9_maint_manual.htm.

A photo of the top electrical bay under the drivers window might help identify some components.

I am a little leery of the brake system and the turn signal system going out at once, since my bus feeds them completely separately.  There is no connection between the two except for they both run from the main power bus.  I would troubleshoot them separately because of that.

I'd help more if I could, honest!

Brian
Logged

1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Spicer 8844 4 speed Zen meditation device
Vintage race cars -
1978 Lola T440 Formula Ford
1972 NTM MK-4 B/SR
eddiepotts
Sr. Member
****
Offline Offline

Posts: 446





Ignore
« Reply #14 on: September 08, 2011, 12:04:22 PM »

Did you read this recall? http://www.arfc.org/rvs/mci/102c3/recalls/000006493000015452000000231/recall.aspx                                                   

Vehicle 1992 MCI 102C3 
Manufacturer MOTOR COACH IND., INC.
Manufactured between 11/1/1991 - 9/1/1992
Recalled on 8/28/1992
Influenced by OFFICE OF DEFECTS INVESTIGATION
Owners Notified on 9/8/1992
# Affected 277
Recalled for EXTERIOR LIGHTING:TURN SIGNAL:SWITCH
   
Description THE POINTS OF THE RELAYS OF THE TURN SIGNAL SYSTEM FUSE TOGETHER DUE TO HIGH APPLIED CURRENT.
Consequences THE FUSING OF THE RELAY POINTS CAUSES THE TURN SIGNALSYSTEM TO BECOME INOPERATIVE AND THE BUS OPERATOR IS UNABLE TO ADEQUATELY SIGNALTURNS TO MOTORING TRAFFIC.
Corrective action INSTALL NEW TURN SIGNAL RELAYS.
Notes SYSTEM: TURN SIGNALS.VEHICLE DESCRIPTION: INTER-CITY BUSES, MODELS 102B3 AND 102C3.
 
Logged
Rick 74 MC-8
Full Member
***
Offline Offline

Posts: 210





Ignore
« Reply #15 on: September 08, 2011, 12:17:10 PM »

I had similar problem with my mc8 I believe the relay  under the driver window there's 1 marked turn signals that I believe is switched by ignition
I would start there there's probably other things that are not working when  the masters switch is on Rick
Logged

About 20 Miles West Of Chicago
luvrbus
Hero Member
*****
Online Online

Posts: 12298




Ignore
« Reply #16 on: September 08, 2011, 12:25:24 PM »

Me I would call MCI Tech with my serial number you will be amazed at the guess work they take out of it, if your problem has ever happen on another unit they will have the answer or you can keep on chasing,you MCI guys have 1 of the best networks for problems and you come here for answers  lol

good luck
« Last Edit: September 08, 2011, 12:29:52 PM by luvrbus » Logged

Life is short drink the good wine first
John316
Hero Member
*****
Offline Offline

Posts: 3222

MCI 1995 DL3, DD S60, Allison B500.




Ignore
« Reply #17 on: September 08, 2011, 02:41:11 PM »

Me I would call MCI Tech with my serial number you will be amazed at the guess work they take out of it, if your problem has ever happen on another unit they will have the answer or you can keep on chasing,you MCI guys have 1 of the best networks for problems and you come here for answers  lol

good luck

Not me, Clifford. There is a reason Grin. I know a guy at tech support pretty well, and we chat pretty often. We have worked through a load of problems, and we often get up and running pretty quickly.
Logged

MCI 1995 DL3. DD S60 with a Allison B500.
bevans6
Hero Member
*****
Offline Offline

Posts: 4596


1980 MCI MC-5C




Ignore
« Reply #18 on: September 08, 2011, 03:13:03 PM »

I had seriously good support from a Canadian MCI parts guy when I had my alternator pulley fall off.  He didn't find my parts (did find a pulley but not the mount) but not for lack of trying!  I was very impressed.  But you know, I never think of calling them for some reason.

Brian
Logged

1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Spicer 8844 4 speed Zen meditation device
Vintage race cars -
1978 Lola T440 Formula Ford
1972 NTM MK-4 B/SR
viking1
Viking
Jr. Member
**
Offline Offline

Posts: 74





Ignore
« Reply #19 on: September 08, 2011, 05:55:59 PM »

OK today I got a little closer.

First of I learned that on my bus the brake lights are illuminated with the parking brake set. I do not know why, but it is how it is. Of course I was checking my brake lights with the coach running and parking brake set. Parking brake off however, the brake lights seem to work just fine. Learned this with an MCI tech on the phone. Very helpfull, they also emailed me a schematic. Now on to the turn signals, I found the flasher unit (i think). and as far as I can tell wire # 45H going to the flasher unit has no power. I am lost. Might fuss with it some more tomorrow. Got big trip to San Fransisco at the end of the month. It would probably be a good idea to figure out the blinkers before then, but at least I got brake lights.
Logged

Price is what you pay.  Value is what you get
lostagain
Hero Member
*****
Offline Offline

Posts: 1524


MC5C




Ignore
« Reply #20 on: September 08, 2011, 06:11:07 PM »

Brake lights being on with the parking brake: duh! I should've thought of it and told you, LOL. But I forget more things every day... Once I had the hockey team's bus in for DOT inspection and the mech tells me the brake lights don't work... What? So I go in the shop with him and we fart around for a few minutes untill I have a little brain wave and remember that the park brake is on and the brake lights are on with it... We both had a laugh, LOL.

JC
Logged

JC
Invermere, BC
1977 MC5C, 6V92/HT740
bevans6
Hero Member
*****
Offline Offline

Posts: 4596


1980 MCI MC-5C




Ignore
« Reply #21 on: September 09, 2011, 04:45:43 AM »

Wire 45 is the same wire designator that supplies power to the turn signal flasher on my bus.  It goes to an auto-reset breaker on the main power bus. fourth one from the left on the bottom row.  You could just have a bad breaker.  Directly above it is a 10 amp breaker for the indirect lamps (again on my bus).  I don't have indirect lamps any more, so I could use that breaker as a spare if I had to.

You are getting closer!  My turnsignals are fed directly from the bus bar, they are not controlled by the master switch.  If power is on, you should have power at the bus bar, and power at the output of the breaker.

Brian
Logged

1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Spicer 8844 4 speed Zen meditation device
Vintage race cars -
1978 Lola T440 Formula Ford
1972 NTM MK-4 B/SR
Pages: 1 2 [All]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!