Hello i am having some trouble with my 1991 ford f150. It has the 4.9l and somewhere in the wiring system it was draining the battery very fast. so i started taking connections off the solenoid and see what it might be. I found out that its a yellow wire coming off the solenoid, but i don't know what the wire does or where it goes to...can anyone tell me or get a wiring diagram to help show it.

 

i'm having the same issue. idk what the issue is but if something comes up i;ll let you know keep me updated on your findings

 

I think thats the ground wire that should attach to the inner fender. hang on ill check my diagram for you

 

here the diagram from my haynes guide hope this helps the yellow one goes to the fuse or thats what i get form the diagram (im not good with them) but hope the picture helps you

 

Shpuld be a fuse link either a W or N. W goes to the fuel pump relay, N goes to the ECM power relay.

 

its fuse link N in the schematic

 

Do you know for sure the battery is good & just not holding a charge? Maybe something is staying on & draining it. Like a light under the hood, cig. Lighter, Something like that.. I think to narrow it down a little more you maybe better off pulling fuses from the fuse box instead of the solenoid wire... When you hit the right fuse it wil not drain it anymore then you can check the wireing for that fuse circut...


Just a thought

Ant...

 

well i know its not the battery cause we just replaced it a little over a month ago and its not the hood light cause its not even hooked up...ill just have to keep on looking

 

If you know for sure the battey is good Then try the fuse method, This will narrow it down alot I would think, You would then know what circuit is drawing the power from the battery.. I was just using the light under the hood as an example..


Ant...