Question about Ford F-150

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Have a 1989 F150 pickup i have replaced the alternator and battery today and it still will not hold a charge and crank over

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You need to Check the Tensioner for the Belt. It sounds like the Belt is not Tight enough to allow the Alt. To charge the Battery. Also check for a Bad Starter Relay in the Fuse Box.

Posted on Jan 23, 2009


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Battery wont hold a charge

There are few possible reasons why battery is not holding charge.May be its weak battery or there is loose connection between battery to alternator.There are few troubleshooting help links,related directly to these types of problem,with there troubleshooting procedure.--------Click the link below and go through its troubleshooting details to resolve the issue:---Car battery loosing its charge overnight?
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Oct 15, 2012 | 1986 Ford Bronco II

1 Answer

89 ford f150 alternator not charging constantly

i could possibably be the internal voltage regulator in the alternator at one time you could buy just the part and replace it dont know if thats possible any more

May 18, 2012 | 1989 Ford F 150

1 Answer

I have a 89 f150 and i think it might have a short in the wiring, as i had a power problem so i replaced the battery. this did not help as two days later the battery was dead again so we replaced the...

try unhooking your spark box on fender after charging battery to full charge then leave it over night to see if this is whats draining your battery if it does not drain battery after trying this replace the box

Dec 24, 2010 | 1989 Ford F 150

1 Answer

My battery and brake light started coming on together. mostly in neutral. dims in 3rd and around corners.

Sounds like bad diodes in the alternator. Have a charging system test done on your truck. If your alternator has bad diodes, it will show up on most charging system analyzers. If this is the case, you will have to replace your alternator.

Oct 17, 2009 | 1989 Toyota Pickup SR5

1 Answer

I have a 1989 s-10 chevrolet pickup charges sometimes

take it to autozone, oriellys, pep boys and they will test the battery, altenator, might want to look into doing so, will save u time and headaches

Apr 29, 2009 | 1989 Chevrolet S-10 Blazer

1 Answer

1992 Ford f150 will not charge

Check the external voltage regulator, if equipped with one. It should be passenger side fender well, or firewall under hood.

Mar 10, 2009 | 1992 Ford F150 SuperCab

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Will not charge


Mar 10, 2009 | 1992 Ford F150 SuperCab

1 Answer

Battery light comes on when I give it the gas and the voltage goes up. Battery and alternator have both been replaced. What could be the problem? It is in a 1989 Toyota Pickup. V6 3.0

Make sure the wires are tight on the back of the alternator and the belt is tight. If they are, the alternator has a bad diode in it.

Nov 24, 2008 | 1989 Toyota Pickup SR5

1 Answer

1989 Toyota pickup with short/dead battery

The brake light combined with the battery light tells me that your alternator is not sufficiently charging the battery. These 2 lights illuminate in tandem when the voltage regulator is not seeing over 12.5 volts. You are going to probably have to replace the alternator, or get it checked & overhauled at an alternator shop.

Nov 03, 2008 | 1989 Toyota Pickup SR5

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