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Old 05-26-2017, 01:01 AM   #1
Mini-Skoolie
 
Join Date: Feb 2017
Location: BC
Posts: 21
Year: 2002
Chassis: Saf-T-Liner MVP EF
Engine: 5.9 Cummins
2002 Thomas FE coach, died on the highway, hotwire it to get it going

I'll try and keep it short and sweet.

Day one of my trip halfway across Canada and I don't even make it to the next city over. I have a blown wastegate actuator, and was driving to the regional Cummins for the part and the bus died on me, radio goes off, key won't re start it.

I tracked down a Thomas ancillary loom that touched the exhaust and shorted out.

I tapped it up and repositioned it, then checked all the fuses with a multi meter (it took a while) they all checked out, so at a loss I read the diagram in the door, found the chassis relay and jumpered the coil, I here the beep and the fuel pump prime, I hop in the bus, turn the key and she fired right up. Appears to run and drive perfectly, BUT because I jumpered the relay, the ignition won't turn it off, I have to pull the jumper out.

I traced the wire back to the dash, but didn't take it apart yet.

Would anyone be able to point me in the right direction, or possibly have a schematic for the Start/ Run/ACC circuits?

Many thanks in advance, I'm stuck in town waiting on the wastegate actuator so I might as well try and tackle this wiring issue.
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Old 06-16-2017, 11:05 AM   #2
Mini-Skoolie
 
Join Date: Feb 2017
Location: BC
Posts: 21
Year: 2002
Chassis: Saf-T-Liner MVP EF
Engine: 5.9 Cummins
update, its been a few weeks, and still have to jumper the chasis coil to start and stop the bus.

I'm still in need of the starting system schematic or line diagrams to diagnose this further
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Old 06-16-2017, 11:44 AM   #3
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Location: Willamina, Oregon
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Coachwork: 97 Bluebird TC1000 5.9
Karl

It would help get you more answers if you list more information about your bus. Sorry but an '02 Thomas FE just doesn't tell anyone enough about your bus to give you advice.

I find your post confusing because your '02 Thomas FE generally indicates you've got a diesel, but you jumpering your coil says you've got a gas engine. Fill out your profile with bus information. Most people here don't care for asking numerous questions one at a time to find out basic information about people's buses.

It's not that anyone is trying to be mean about this, but many of us look at 50 or more "issues" a day and they tend to get mixed up if you don't have your basic bus information posted.
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Old 06-16-2017, 12:10 PM   #4
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Join Date: May 2016
Location: Georgia
Posts: 1,549
Year: 2001
Coachwork: Blue Bird
Chassis: IH
Engine: T444E
Rated Cap: 14
Yes, it will be *VERY* helpful to at least know what engine is in this bus.

Imagine me asking an electrician to "Fix my lights" and offer a diagnosis over the phone - but forgetting to mention I haven't paid the power bill in 6 months ....
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Old 06-16-2017, 01:41 PM   #5
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Strange analogy, but somehow it works.
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Old 06-16-2017, 02:27 PM   #6
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Some of us are/were electricians, not magicians!
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Old 06-16-2017, 02:33 PM   #7
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Quote:
Originally Posted by BlackJohn View Post
Some of us are/were electricians, not magicians!
Same thing far as I'm concerned!
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Old 06-16-2017, 02:59 PM   #8
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That's why you guys should have taken that psychic 101 class in college.
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Old 06-16-2017, 04:14 PM   #9
Mini-Skoolie
 
Join Date: Feb 2017
Location: BC
Posts: 21
Year: 2002
Chassis: Saf-T-Liner MVP EF
Engine: 5.9 Cummins
my apologies on missing key parts, I posted it on mobile, and in a bit of a haste.

The Bus has a 5.9 Cummins ISB190 matted to an allison 545
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Old 06-16-2017, 04:22 PM   #10
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Join Date: Jun 2013
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Chassis: GMC
Engine: Cat 3116
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Sounds to me like the coil needs to be checked with an ohmeter for continuity first of all. If jumping it makes it start then either the coil is bad or the contacts are welded shut.

John
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