Question about 1989 Ford F 150
I have an 89 F150 302, about 6 weeks ago the battery was dead. I replaced it and the truck started up fine. The next day the battery was dead. I replaced the alternator and it is working fine. The truck starts up and runs fine, then when I shut it off it will not start(not enough juice to turn starter). If I let it sit for a day or two it will start right up, then wont start after I shut it off! I replaced the soelenoid and pcm relay they are working fine. My grounds all look good but something is happening to make it not start. Any ideas will help. I am at my wits end. Sometimes when I am driving the yellow "Check Engine Light" will flash a few times and my battery power will drop about by half, then it will pick right back up.
If you see the battery voltage dropping by 50% periodically then you have a serious short somewhere.
The first thing to do is be certain no lights are on then disconnect the battery ground.
If you don't have an amp meter then then disconnect the ground wire from the battery and connect a 12 volt test light from the cable to the battery post[If it does not light then reverse the leads from the test light because some are polarity sensitive].
If the bulb lights and you are sure nothing is on, the key is off and the doors are closed; then pull all the fuses and hook-up the test light.If the light still comes on you will probably need to seek some professional help.
If the light does not come on, then plug the fuses in one by one until you see the test light come on.
Unplug the last fuse, if the light goes out then that is the circuit where the short is located.
Posted on Jan 07, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 29, 2012 | 2000 Dodge Ram 1500 Truck
Aug 27, 2008 | 2002 Ford F150 Regular Cab
Jan 28, 2011 | 1996 Ford F150 Regular Cab
Dec 08, 2010 | Kia Sedona Cars & Trucks
Sep 16, 2010 | 1989 Ford F 150
Nov 08, 2009 | 1995 Ford F150 Styleside Regular Cab
Feb 18, 2009 | 2004 Ford F150
222 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: