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Joined: Aug 2016
Posts: 94
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Aug 2016
Posts: 94 |
38 2dr sdn I hooked headlight switch directly to starter.. thot maybe voltage reg. was bad and spiking voltage but no change bulbs last about one day ..I also hooked a extra ground wire from bat to body of car still no change..is there a new replacement bulb that will hold up better ??sc
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Joined: Sep 2007
Posts: 654 Likes: 3
Oil Can Mechanic
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Oil Can Mechanic
Joined: Sep 2007
Posts: 654 Likes: 3 |
Make sure the sockets are clean and well grounded.
J Franklin
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Joined: Sep 2002
Posts: 2,323 Likes: 6
ChatMaster - 2,000
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ChatMaster - 2,000
Joined: Sep 2002
Posts: 2,323 Likes: 6 |
What is your voltage when the engine is running fast enough to charge? It should be around 7.5 volts with a battery in good shape.
My 1951 1 Ton is now on the road! My 38 Master 4 Door is also now on the road .
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Joined: Jan 2006
Posts: 7,046 Likes: 107
Hall Monitor ChatMaster - 7,000
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Hall Monitor ChatMaster - 7,000
Joined: Jan 2006
Posts: 7,046 Likes: 107 |
What bulbs are you using? I bought a dozen Chinese repops and they would last about five seconds. I then got a bunch of NOS bulbs off of ebay and have had no problems.
VCCA Member 43216
Save a life, adopt a senior shelter pet.
1938 HB Business Coupe
1953 210 Sedan
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Joined: Aug 2016
Posts: 94
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Aug 2016
Posts: 94 |
Battery controls voltage more than the regulator..at the battery voltage should be 6.5 volts,(I have not measured it but will today at fast idle)remove battery and voltage will spike to 15+ volts,bulbs are old stock 1940's off ebay..I was thinking of going to halogen or something like that ,anyone have a idea ??
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Joined: Jan 2006
Posts: 7,046 Likes: 107
Hall Monitor ChatMaster - 7,000
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Hall Monitor ChatMaster - 7,000
Joined: Jan 2006
Posts: 7,046 Likes: 107 |
It should never spike to 15V.
VCCA Member 43216
Save a life, adopt a senior shelter pet.
1938 HB Business Coupe
1953 210 Sedan
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
Do you think that could be the problem? 
Gene Schneider
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Joined: Aug 2016
Posts: 94
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Aug 2016
Posts: 94 |
Checked voltage today 6.5 volts at starter at fast idle ..voltage will never spike to 15 with battery hooked up only when cable is removed..I leaned this the hard way years ago with running car with lights on and then remove bat cable,
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Joined: Jan 2006
Posts: 7,046 Likes: 107
Hall Monitor ChatMaster - 7,000
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Hall Monitor ChatMaster - 7,000
Joined: Jan 2006
Posts: 7,046 Likes: 107 |
As a poor youngster who really didn't know any better and couldn't afford a new battery, I used a friends battery a few times to start my car then disconnected it & ran on the generator to get home. I never had that type of an issue. Until now I've never heard of it being normal for voltage to spike with the battery disconnected. That's what the voltage regulator is for, to regulate the voltage. I'll admit I'm not expert so I could very well be wrong but it's a new one on me and I would never consider that behavior to be "normal".
VCCA Member 43216
Save a life, adopt a senior shelter pet.
1938 HB Business Coupe
1953 210 Sedan
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Joined: Sep 2002
Posts: 2,323 Likes: 6
ChatMaster - 2,000
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ChatMaster - 2,000
Joined: Sep 2002
Posts: 2,323 Likes: 6 |
6.5 volts at the starter would indicate it was not charging.
My 1951 1 Ton is now on the road! My 38 Master 4 Door is also now on the road .
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Joined: Aug 2009
Posts: 254
Backyard Mechanic
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Backyard Mechanic
Joined: Aug 2009
Posts: 254 |
Is it possible someone strapped a cut-out switch from a 37 to your generator? Believe me, they do not regulate the voltage.
1937 Master DeLuxe Business Coupe
1954 3100 5-Window
1954 Corvette
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