headlights and ammeter

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Jul 29, 2002 | 02:19 PM

kemp67d

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From: chaplin usa

headlights and ammeter

[updated:LAST EDITED ON 29-Jul-02 AT 03:22 PM (EST)]My names David ,I have a 1979 f250, everything under the hood is new .A friend and I built a 351 windsor with alot of goodies. It has been in the truck ayear now, and now out of the blue the headlights are pulsating and even with them off my ammeter needle constantly jumps to the right. Alt, voltage regulator were all new. Can anybody tell me what to do? Thanks

Jul 29, 2002 | 02:24 PM

HotWhlz85

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From: Elon, NC

headlights and ammeter

[updated:LAST EDITED ON 29-Jul-02 AT 03:25 PM (EST)]I'm no electrical expert, but I'd start by checking the obvious....connections. Since you rebuilt this motor(and you obviously had the engine out and then back in the truck) make sure your ground is good. Check all wiring to make sure connections are tight then proceed from there.

Ron

Edit: And welcome to FTE!!!

Jul 29, 2002 | 02:25 PM

dpoelstra

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Joined: May 2002

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From: Garden Grove USA

headlights and ammeter

my '86 is doing the exact same thing. It is internally regulated, and I am assuming that it is the voltage regulator. Am I right?

Jul 29, 2002 | 03:11 PM

kemp67d

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From: chaplin usa

headlights and ammeter

Thanks for the quick response, I checked all grounds and they seem to be good and tight. could it be in the alt?

Jul 29, 2002 | 04:51 PM

HotWhlz85

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From: Elon, NC

headlights and ammeter

The easy way to find out is take it to AutoZone/Advance Auto, etc. I know the two I mentioned here will check your alternator for free.

Ron

Aug 12, 2002 | 09:41 PM

kemp67d

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From: chaplin usa

headlights and ammeter

Well its been awhile since I posted my problem and I have gone to an electrical shop they swore it was the voltage regulater, so I replaced it still no luck, took the alternater and had it checked they said it was perfect. I have grounds from hood to cab from frame to fenderwell from block to firewall and neg battery terminal to block.

Aug 13, 2002 | 12:09 AM

82F100SWB

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From: Dryden, ON, Canada

headlights and ammeter

Try changing the light switch, they have a circut breaker built in, and, they do tend to get weak after it's been tripped once or twice and cause the lights to flash on and off.
Evan
86 F250 HD XLT Lariat Explorer 4x4:
460/T19/BW 13450 3.55 geared Full Floater 10.25 and Dana 50 TTB
1982 F100 SWB
300 HD: NP 435/2.75 geared 9"
78 F150, 351M/C6, soon to be repowered with a 400