I have a f-100 302 1977 with a charging problem. I replaced the altantor, nothing, replaced the voltage reg, nothing. I took the altantor back out and took it to the auto parts store and it checked out fine. I put it back in still nothing. So I have a new altantor, and new voltage reg. and am not getting a charge to the battery. Any help out there. Thanks Jeff

 

You have a blown fusible link, check your harness coming off of the solenoid.

 

Thanks, I will check that out. I have no idea where it at. any help. Thanks Jeff

 

Here is the alternator, wiring harness and regulator I just pulled from my truck. The fusible link is in the darkened circle and should be attached to the starter solenoid along with the + battery cable.

 

Thank you. Wow this is great. Thanks again Jeff

 

Bullitt 390, I just rang out both of those fuses and they were both OK. Lost again. looking for help.Thanks Jeff

 

What do you mean by "rang out"?

You'll likely need to test it with a multimeter, a fusible link can look great, but in fact be blown.

If the fusible is ok, the alternator is new and the Voltage regulator is new you need to start tracing wires for breaks. The system is fairly simple and it's all contained right there by the battery area.

Does you horn work? The same wiring harness that contains the connector for the horn also contains the "I" exciter for the alternator.

 

Thanks, I put a meter on the fuses and they were OK. The horn works, so I think I will replace the new voltage reg. and see if I just have a bad one. After that it may be wires. If you have any other ideas I am open.
Thanks for everything. Jeff

 

Randomly replacing parts is useless and bad practice. Do you have an ALT light, or an ammeter on your gauge cluster?

 

I have a multi meter. Thanks Jeff

 

No, your truck dash gauges... do you have the amp and oil pressure gauges or idiot lights?

Josh

 

Yes sir, I have an operating amp gauge, It is showing me a touch on the D side when the truck is running. Before I installed the new voltage reg. it was dead in the middle. Thanks Jeff

 

Billitt 360
Thanks for all your help again. I replaced the new voltage reg. and bam all is well. A $10.00 part, go fetch. Anyway all that agervation for a bad part. You have been very helpfull and I just wanted to say thanks again. Jeff

 

What style voltage regulator did you use... the original points style or the newer solid state?

Just curious...

Josh

 

It was a Duralast VR730 I don't know much after that. Now that I'm back working on this old truck I need to brush up on my old gear head side. Its been about 35 years. You forget a bunch. Thanks again. Jeff