87 Ford F150 Lariat

Asked by Katthom Jan 21, 2019 at 02:05 PM about the 1987 Ford F-150 STD Standard Cab LB

Question type: Maintenance & Repair

I have replaced the solenoid the alternator
and the battery. But it is still not charging
and leaves me on the side of the road
regular. What should I try next?

3 Answers


It being an 87 there should be 2 big fuses under the hood that are for the alternator. Have u looked to see if those are fried? I had an 89 ranger xlt and I thought I screwed my alternator one day and was about to go get another one cuz I could get it to charge long enought I fire up run for 10 seconds and die. I looked at all the fuses an sure enough there was 2 of them fried.

1 people found this helpful.

An 87 would be fuselinks, if they were fried then the main power to the alternator would be nonexistent. So check for main power at the alternator and make sure the ALT light comes on when you turn on the key, that light must work or the alternator exciter circuit is dead. Then if you still have problems then dig out the book and start tracing wires.

1 people found this helpful.

You are so going to get a laugh out of this. The problem with my alternator not charging on my 87 Ford F150 Lariat 2 wheel drive, was when I changed out the solenoid the wire going to the alternator did not get put on the solenoid. LOL and I have already bought $108 alternator that's and electrical part, they won't take it back. All you can do is laugh or otherwise we would spend a lot of time crying. So to all you mechanical men out there when a overly distraught do it herself kind of woman says I replaced this this and this be the hero find what she forgot to put back on and fix it for her please. My lesson from this is always double-check the person that is helping you. And if something doesn't work after an install or something is different about the dash lights go back and look at that install you can never be too confident that you forget we are all open for era.

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