Starter want disengage when truck is cranked up
That would indicate either the ignitiion switch is sticking, or the solenoid is sticking, or your starter is just worn out.
You can test the ignition switch & the solenoid with just a 12 Volt test light at the starter with the help of an assistant.
Remove the solenoid "start" wire & use the test light to connect to it & watch while the ignition switch is operated from start to on for several test. Have the person turning the key to say when they are doing the on & start so that you will be able to determine if it is stickiing.
To test the solenoid, you'll need to have the wire connected again & put the test light probe on the lower Starter terminal, the one that connects directly to the starter, and have the car started. the light should only light as long as the ignition switch is in the "START" position & go off immediately upon releasing the ignition switch. If the light stays lit for even a moment after releasing the ign. switch, the solenoid or the solenoid & starter will need to be replaced.
The solenoid & starter aren't always replaced at the same time but you generally would due to the same amount of use and potential for future breakdowns due to only replacing the one part. You also get a better rebuilt product as a rule when you buy it with the lifetime warranty which has both parts included. The starter would be at fault if the other 2 test failed & that could be as a result of normal use, or just a lack of lubricant on the bendix shaft. You can have it tested as well as the solenoid tested, at your local auto parts store.
Feb 14, 2010 |
1988 Ford F 150