Fassi

Ladies and Gentleman,

I just installed a rebuilt alterntor from Vertex a couple weeks ago and I just got back from getting a new big Interstate battery put in. Surprise! My headlights (and guage lights) are still slightly dim at idle. Is this normal? Please help I'm going crazy. Thanks.

TC_SJ

sound like alternator problem, you could get the one is defect from manafacture

Decolliber

Voltage regulator? I had same problem, and it wnet away when I replaced the whole alternator and voltage regulator.

Fassi

I replaced the alternator/regulator with a rebuilt unit from Vertex Auto.

993chaz

I have the same proble, time to replace your alternator!!

Fassi

Guys,

I've already replaced the alternator, the regulator, and the battery. Is there anything ELSE that could be causing the slight dim at idle or is this normal in the 911. Thanks.

Sean Hamilton

Mine is the same Fassi, and I've also replaced the alternator, regulator and installed a new battery. Admittedly I wasn't chasing dim illumination - I just blew the lot in a reverse polarisation!
It has never bothered me tho'. At idle the head lights and dash lights dim a little. Once under way they light up a wee bit brighter. I just thought it was normal.
The wife's modern Nipponese nut bucket is the same. Have you asked your sparky his opinion?

Cheers,
Sean.
1980 Hellblaumetallic SC Targa

andycan

How about the ground wire from the battery to the body, check for cond.