Got a Problem, won't start

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Aug 11, 2016 | 09:47 PM

#16

z31freakify

Hotshot

Joined: Dec 2012

Posts: 11,278

Likes: 1,658

From: Las Cruces New Mexico

I just fixed this same problem GPR was culprit I by passed the smaller wires going to it realay #2 stopped clicking had a WTS light and truck started right up. Unplug those two wires and connect them together and try it.

Aug 12, 2016 | 07:40 AM

#17

PSU4ME

Thread Starter

More Turbo

Joined: Jul 2016

Posts: 546

Likes: 1

From: Boston

Quote:

Originally Posted by z31freakify

Thanks, will try that this morning. I do have a new GPR coming so hopefully this it it.

I assume the GPR isn't providing a proper ground if this is the issue? I then have to assume that the code reader is somehow bypassing this when it is plugged it?

Aug 12, 2016 | 08:07 AM

#18

Jarrett Campbell

Cargo Master

Joined: Jul 2015

Posts: 3,076

Likes: 21

From: Aransas Pass, Tx

I have started and ran my truck without a GPR.

Aug 12, 2016 | 08:30 AM

#19

oldbird1965

Fleet Owner

Joined: Aug 2004

Posts: 20,419

Likes: 197

From: AZ

Quote:

Originally Posted by z31freakify

Why connect them together? I just pulled them off the GPR and taped them up individually.

Aug 12, 2016 | 08:41 AM

#20

madpogue

Lead Driver

Joined: Oct 2003

Posts: 8,476

Likes: 37

From: Madison, WI

Connecting the two small wires creates a direct short from the fuse #22 circuit to ground, at least during the time the PCM would be energizing the GPR.

Aug 12, 2016 | 08:51 AM

#21

PSU4ME

Thread Starter

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Joined: Jul 2016

Posts: 546

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From: Boston

So better to just disconnect them? We put them together, no change, no blown fuses.

Still puzzled why it starts normally with the code reader plugged in but dies when it is removed.

What does the code reader do/bypass that would cause this?

Aug 12, 2016 | 09:18 AM

#22

z31freakify

Hotshot

Joined: Dec 2012

Posts: 11,278

Likes: 1,658

From: Las Cruces New Mexico

It won't start if the circuit is not complete, you won't get a WTS light either.

Aug 12, 2016 | 09:30 AM

#23

PSU4ME

Thread Starter

More Turbo

Joined: Jul 2016

Posts: 546

Likes: 1

From: Boston

well we found it, the ground at the ebrake mechanism wasn't solid. Truck starts and runs fine without the code reader in.

Thanks for all the ideas guys!

#damnelectrical

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Aug 12, 2016 | 09:55 AM

#24

oldbird1965

Fleet Owner

Joined: Aug 2004

Posts: 20,419

Likes: 197

From: AZ

Quote:

Originally Posted by madpogue

Connecting the two small wires creates a direct short from the fuse #22 circuit to ground, at least during the time the PCM would be energizing the GPR.

Quote:

Originally Posted by z31freakify

It won't start if the circuit is not complete, you won't get a WTS light either.

Mine have been taped individually apart for a thousand miles now. When I was on the way to RRE and had problems (you might have read it) Bill suggested I tape them apart. They will stay that way until mid Oct when I get back to AZ for the winter when at that time I will put on a new GPR and test the PCM and IDM that I replaced to try and figure out what happened. The problems started with a CPS code and ended with a CPS. My GPR MIGHT have shorted out sending a ground thru the PCM and IDM, IDK and probably will never know.