Reply
 
Thread Tools Display Modes
 
Old 04-27-2010, 02:00 PM   #1
Mini-Skoolie
 
Join Date: Apr 2010
Posts: 23
Year: 95
Coachwork: Thomas
Chassis: GMC 3500
Engine: 6.5 diesel
Rated Cap: 14
short bus flashing lights - but not the good kind

I'm currently driving a 95' GMC 3500 Cutaway van with a Thomas 16 passenger body that I bought about a month ago.

I have a couple of questions about the lighting.

First question: After the lights are on for about 15 to 20 minutes they will randomly start to cutout or flash whether I'm driving or parked. They don't go out for long, it is just a blip and they are back on for a 4 or 5 seconds and then blip. If I shut the lights off for a couple of minutes and turn them back on they will work again for about 15 to 20 minutes before they start up again.
Does this sound like a circuit breaker? or a short? any other ideas?

Second question: The clear exterior light over the bifold passenger comes on with the interior lights and with the running lights. Is it supposed to be on when you are driving around with the running lights on?

Thanks.
snonbos is offline   Reply With Quote
Old 04-27-2010, 03:11 PM   #2
Bus Crazy
 
Stuff's Avatar
 
Join Date: Apr 2010
Location: Estevan, Saskatchewan, Canada
Posts: 1,485
Year: 1990
Coachwork: Goshen
Chassis: Ford
Engine: 7.3
Rated Cap: 25
Send a message via AIM to Stuff Send a message via MSN to Stuff
Re: short bus flashing lights - but not the good kind

i dont think the interior light should be on. probably wired to wrong light or the driving lights was aftermarket and hooked up wrong and is feeding back.

as for other lights.. i think its a relay problem
__________________
1990 E-350 Goshen Coach - 7.3L Diesel ---> http://www.skoolie.net/forum/viewtopic.php?f=36&t=5756

My Youtube channel - https://www.youtube.com/user/thestuffz
Stuff is offline   Reply With Quote
Old 04-27-2010, 10:17 PM   #3
Mini-Skoolie
 
moerules's Avatar
 
Join Date: Mar 2010
Posts: 16
Year: 1983
Coachwork: Wayne
Chassis: Ford F600
Engine: 370
Re: short bus flashing lights - but not the good kind

could possibly be the headlight switch itself if yours is set up that way. Mine has a switch in the dash just like a car or truck would. My old trucks would flash and it was the switch heating up and causing the problem. Installed new switch and it was fine!!! Also my bus when lights are on the light in the stair way and above the door light up. I diconnnected the one above the door but left the stair light hooked up so when lights are on it is also.
moerules is offline   Reply With Quote
Old 04-27-2010, 10:37 PM   #4
Mini-Skoolie
 
Join Date: Apr 2010
Posts: 23
Year: 95
Coachwork: Thomas
Chassis: GMC 3500
Engine: 6.5 diesel
Rated Cap: 14
Re: short bus flashing lights - but not the good kind

Thanks for the tips.

I think I've found my light issues.

The first problem I found was that the ground wire to the Dash Headlamp switch was not hooked up. After reconnecting it the exterior lamp worked as it should.

I took it for a test drive hoping this was also causing my blinking light issue but after about 30 mins. it started acting up again. I took some time to play around with the light switch when I got home. With the headlamp switch hanging loose, but hooked up, if I held it at a certian angle the lights would work fine. If I rotated the switch with my hand and/or moved the wiring by the switch it acted up again. If I moved it back to the same spot it would work fine every time.

Here is a pic of the headlamp switch connection.



As you can see there are some issues there. The headlight and taillight wires are spliced together(not sure why?).
On the upper right corner you can see a bare wire. It is for the taillights and is live when the switch is on. The insulation is melted off it for about 6-8". That is the same terminal that is melted on the connector as well. It doesn't look recent so I will redo the wiring and see what happens.
Hope that does it.

As far as the bus. 95' GMC with Thomas body.

Here it is after the 2 1/2" hour drive home:




After getting it retitled and inspection by state patrol.




I have been driving a 96' suburban for years and love it but was looking for something with a little more cargo room. Originally going to go with a cargo van but I saw this on Cl and thought it would work pretty well to haul stuff/people. I ended up leaving half the seats in so it is titled as a car.

Been looking through all the great posts & pic's on the site... Trying hard to fight off the big bus bug....
snonbos is offline   Reply With Quote
Old 04-29-2010, 09:51 PM   #5
Bus Crazy
 
Join Date: Jan 2008
Location: Upstate NY (Mohawk Valley)
Posts: 1,096
Re: short bus flashing lights - but not the good kind

The insulation displacement splice nearest the connector is bad news even if it is brand new - and the cover isn't even latched shut!
Replace those whenever you find them. Don't ever use them on purpose for anything.

From the first description I had thought it would be a circuit breaker. Self-resetting breakers for critical loads like headlights and wipers are thermal acting. The current runs through them and heats them up. They open (disconnect) when they get overly hot, and reconnect once they cool down. Splicing the taillights into the headlight circuit might just be enough of an added load to make the headlight breaker shut off during extended use.

But the melted wiring and the jiggling of the switch points to a bad connection or worn-out switch as was previously mentioned. Make it right, or get a couple of heavy-duty toggle switches, and wire the headlights and taillights separately to them. You don't want a fire in your bus. I have seen a vehicle interior burned out from a bad headlight switch. (The highway superintendent tried to blame it on the radio install, so the town wouldn't have to pay for the repair, but the town mechanics agreed with my inspection that the fire was caused by the headlight switch.)
__________________
Someone said "Making good decisions comes from experience, experience comes from bad decisions." I say there are three kinds of people: those who learn from their mistakes, those who learn from the mistakes of others, and those who never learn.
Redbear is offline   Reply With Quote
Old 04-30-2010, 07:11 AM   #6
Mini-Skoolie
 
Join Date: Apr 2010
Posts: 23
Year: 95
Coachwork: Thomas
Chassis: GMC 3500
Engine: 6.5 diesel
Rated Cap: 14
Re: short bus flashing lights - but not the good kind

After spending some time with a multimeter I ended up replacing the headlamp switch with a new one and cleaning up and seperating the wiring back to it's own circuits. Now all the lights come on as and when they should.

it looks like the previous owner tried to correct for the bad switch by rewiring the connector to make it work.

Thanks again
snonbos is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Won't Start - Lights Flashing skoolie-couple International | Navistar Drivetrain 4 12-02-2014 02:08 PM
Running Lights and tail lights not working bapos Alternative Fuels | Electric, Propane, Wood Gasification, etc. 2 12-14-2011 12:32 PM
Tail lights,running lights not working putterspitt Conversion General Discussions 2 10-12-2010 06:19 PM
anyone know where i can find a good short/mini bus for sale wesw0000 Classifieds | Buy, Sell, Swap 1 01-16-2010 01:04 PM
short in running lights jl ruby Conversion General Discussions 6 03-15-2006 09:21 AM

» Virginia Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 10:47 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.