fuel pumps???
Thread Starter
|
Senior User
Joined: Apr 2006
Posts: 201
Likes: 0
fuel pumps???
Where is the " fuseable link" for the power for the fuel pumps on a 90" f-250 twin tank? I had no power, so I wired the rear pump directly off the fuse box to get her going again and it worked. I did the grounding of the test port thing, and everything clicked and did what it was supposed to, but the pumps would not run for 1 sec like they should. The inertial switch seems to be fine, the tank switch also seems to work. There is just no power to either pumps.
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
I do not know without some testing.
Did you use a test light on the inertial switch or are you guessing?
Does the engine run when you have the fuel pumps jumped that way?
If so more than likely you have bad connections on the bottom of the relay socket for the fuel pump relay.
It also could be the fuel pump relay itself.
Use a test light in all of the tests on this system as a DVM will not help much in this circuit.
Here is a diagram to get you started, you may have either one of the relays at the bottom of the diagram or you can use the pin-out to change to the Bosh stile relay if you need to change.
Note:
The wire coming off the inertial switch may be Pink with a black stripe and then turn Red with a yellow stripe at a splice.
/
Did you use a test light on the inertial switch or are you guessing?
Does the engine run when you have the fuel pumps jumped that way?
If so more than likely you have bad connections on the bottom of the relay socket for the fuel pump relay.
It also could be the fuel pump relay itself.
Use a test light in all of the tests on this system as a DVM will not help much in this circuit.
Here is a diagram to get you started, you may have either one of the relays at the bottom of the diagram or you can use the pin-out to change to the Bosh stile relay if you need to change.
Note:
The wire coming off the inertial switch may be Pink with a black stripe and then turn Red with a yellow stripe at a splice.
/
