So as most of you know i have a 97 California truck and ever since i have owned the truck it has had a p1391/p1393 code. Which is descibed as low amperage to left and right bank glow plugs.

The Cali trucks have a shunt that has a set resistance—anything less, and the PCM knows something is wrong and triggers the CEL. I thought it was the relay so i replaced it with a stancor a while ago, i was talking with a friend and he thought i had it wired wrong so i rewired it so i wired it how he thought would work and it melted the shunt...

So my question is, besides the GPs them selves being bad, what could cause this light to stay on? And what is the PROPER wiring for the GPR with a shunt? I have found nothing with the detail im searching for.

PS: where can i buy a new shunt?

 

Boy do I wish I could help Aaron. I have no cali experience but her is a bump for you.

Heard from rob lately?

 

I have never been under the hood of a Cali truck, so I'm not much help. But, good to see you on here bud!

 

Yeah man! Im around, got my BTS going in next week, and a ton of other work. If it wasnt a PITA to post pics up here id let yall see

 

Rock auto should have them ... do a search for F81Z-12B533-BA

More Information for MOTORCRAFT DY840

 

Yeah i here from Rob a lot. We live 5 miles from eachother lol. After all he put into bigblue he wants to sell her for a newer truck thats a little more rleiable. But he picked up a 71 reg cab Short bed F100 2wd on 77 suspension and a E99 7.3 and a zf5, and man that thing is a blast to drive.

 

Darn..everybody selling...I'm just worried about perfecting my ride lol

Yea the 71 is pretty cool!!

 

I have a cali truck as well. Your best bet from what I have read is too buy another shunt from ford and bend it to form the stancor relay.

This is the reason I stayed with the OEM GPR.

 

I've seen pics of the shunt on the Stancor relay, not having been bent. I think it's just mounted upside down compared to how it's mounted on the OEM relay.

Gotta wonder how it would fit on a Western Plow 56131K.....

 

Save your $$ and just buy the Western snow plow relay and put the shunt on it. Thats what I did on my 97