GPR wiring
Thread Starter
|
Senior User
Joined: Aug 2006
Posts: 365
Likes: 0
GPR wiring
I have a '95 PSD f250 4x4 SC....I bought this truck 1.5 years ago...it came to me in a non-start when cold condition...swapped out GPR and glo-plugs...still no start...read here and there for days and figgered the injector poppet valves must be worn...today...just cos I actually felt good enuff to get under the hood...I took my multi-meter to the GPR...no power to either big post with Key Off...with Key On no power to either post...seems I have a break somewhere in the GPR to solenoid harness...any help/experience on a simple almost painless fix????
TIA
mojo
TIA
mojo
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
One of the big posts should be hot all the time, Blk/Org on mine. If you follow it I believe it goes over to the starter relay on the passenger fender. Also there are two fuse links somewhere in the wire.
Postmaster
Joined: Sep 2007
Posts: 4,195
Likes: 6
From: Medford Oregon
It's a separate wire. You can make up a temporary jumper wire from the starter solenoid to the GPR (hot) terminal and see if it works. If so then fuse links are probably blown.
Thread Starter
|
Senior User
Joined: Aug 2006
Posts: 365
Likes: 0
thanks again...I'll go with 8 gauge as a mock up to see if this works...then will replace with dual 14 gauge wires...
)
mojo
)mojo
Trending Topics
Thread Starter
|
Senior User
Joined: Aug 2006
Posts: 365
Likes: 0
well...I built an 8 gauge temp connecting wire...unplugged old wire and hooked up new wire...good news is there is 12 volts to GPR....bad news is when I turn the ignition to "ON"...not "Start"...the truck starts on its own and the starter stays engaged...I caught it fast enuff to not burn the starter out....I hope...any ideas???
mojo
mojo
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Post Fiend
Joined: Feb 2009
Posts: 8,773
Likes: 1
From: Texas Coast
Sounds like your backfeeding your starter relay. Locate your starter relay on the top left (pasenger side of the truck) If you ran a jumper wire to the GPR pull both batts negative wires and then remove that jumper. Then look over your starter relay near the coolant tank on top of the fender.
I think that there are a couple of fusable links somewhere there and maybe you shunted around it with the new wiring sending power directly to the starter.
I think that there are a couple of fusable links somewhere there and maybe you shunted around it with the new wiring sending power directly to the starter.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
On the starter relay, one side has battery power at all times.
The glow plug relay pulls power from that side of the starter relay.
In your case, sounds like you attached one end of the jumper to the starter side of the starter relay and the glow plug side of the glow plug relay.
So when you turned the key on, power from the glow plug relay went back to the starter relay on the starter side.
The good news here, sounds like your glow plug relay is working like it should be.
The glow plug relay pulls power from that side of the starter relay.
In your case, sounds like you attached one end of the jumper to the starter side of the starter relay and the glow plug side of the glow plug relay.
So when you turned the key on, power from the glow plug relay went back to the starter relay on the starter side.
The good news here, sounds like your glow plug relay is working like it should be.
Thread Starter
|
Senior User
Joined: Aug 2006
Posts: 365
Likes: 0
I connected the temp wire to the front side of relay...the side that has 12V always...basically replaced the wire in the same position as the original...it wasn't hard to trace back...now I'm back to pluggin' it in....grrr
mojo
mojo
