Fuel pump relay location

oldguy · Post by **oldguy** » Wed Jul 20, 2016 8:22 pm

Hello to all,

I am trying to locate the FP Relay in a 85 ASC Convertible. I did manage to find the ECC relay so far, but no FP relay, I'm assuming it has a Pink/Black hash marked wire but stranger things have happened.... A copy of a correct schematic would also be very helpful.

Thank you

4-barrel Mike · Post by **4-barrel Mike** » Wed Jul 20, 2016 11:10 pm

I believe it's under the driver's seat.

Power in - Yellow (18 ga fuse link in engine compartment)
Power out - Pink/black hash (to fuel pump)
Relay activation power (from inertia switch) - Red/black hash
Relay ground (via ECM) - Tan/light green dots

Info from 1985 Mustang/Capri Electrical & Vacuum Troubleshooting Manual (aka EVTM) http://www.ebay.com/itm/FREE-SHIPPING-1 ... iW&vxp=mtr

Mike

oldguy · Post by **oldguy** » Wed Jul 20, 2016 11:24 pm

Thanks Mike, but it's not under the driver's seat.

Post by **negusm** » Thu Jul 21, 2016 12:50 am

85's had electric fuel pumps?

Manual cars had mechanical ones.

Automatic CFI ones, I am not sure on.

-Mike

knsstang · Post by **knsstang** » Thu Jul 21, 2016 2:19 am

oldguy wrote:Hello to all,

I am trying to locate the FP Relay in a 85 ASC Convertible. I did manage to find the ECC relay so far, but no FP relay, I'm assuming it has a Pink/Black hash marked wire but stranger things have happened.... A copy of a correct schematic would also be very helpful.

Thank you

I have an 89 and mine is under the drivers seat. I've wired a fuel pump shutoff toggle switch to it (hidden to aid with anti-theft).

Post by **negusm** » Thu Jul 21, 2016 1:30 pm

It's funny, I have seen a few people on the net say they found it under the driver's seat on an '85...one guy mentioned that if the carpet is replaced the installer will not often cut a spot for it to go through.

Another guy said his was in the trunk next to the latch.

-Mike

oldguy · Post by **oldguy** » Thu Jul 21, 2016 2:08 pm

I removed seat to expose Alpine power amp (flopping around) and will pull carpet up once seat bracket and amp are removed (amp will be properly disposed of) as it feels like it could be under the carpet. I'll follow up with a post.

Thanks

oldguy · Post by **oldguy** » Thu Jul 21, 2016 3:05 pm

I was wrong it's under the seat under the carpet.

I had a mental block about fixing this thing till I found the FP relay. The blk/grn wire at the ECC relay according to wiring schematic is chassis ground, however it is intermittent. Yes it also terminates at #40 & #50? (hard to id on schematic) at the ECM and both HEGO sensors. I'm okay with splicing into blk/grn near ECC relay and grounding it. Yes the car runs when I ground it. The FP relay will remain EXPOSED under the seat now. Unsure how to post pix so imagine a low mileage red convertible that has survived in a museum for most of it's existence with an example of some of the most frightening stereo installation techniques I've run across.

Thanks Again

4-barrel Mike · Post by **4-barrel Mike** » Thu Jul 21, 2016 4:10 pm

Mike

4-barrel Mike · Post by **4-barrel Mike** » Thu Jul 21, 2016 6:00 pm

oldguy wrote:. Yes it also terminates at #40 & #50? (hard to id on schematic)

EVTM shows 40 & 60 (which I think is a Ford standard, as later pin breakouts show the same).

Mike

ascMcLaren Enthusiasts

Fuel pump relay location

Fuel pump relay location

Re: Fuel pump relay location