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1948 Desoto electrical issue

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kfunnyman
User
kfunnyman profile image

Feb 18, 2013, 11:01 AM

Post #1 of 4 (2765 views)
1948 Desoto electrical issue Sign In
1948 Desoto still 6 volt. Driving at night a few days ago and all the lights suddenly went out on the car. The car did not lose power. It kept driving quite nicely. 30 seconds later the lights came back on. 30 seconds later the lights went back off. This continued for the next 10 minutes until I got home. The next day I started the car and let it run for 20 minutes or so with the lights on. Nothing happened. However, I put my hand on the light switch under the panel and noticed that it was quite hot. Is this perhaps a sign that my light switch is going out? Maybe a bigger problem? Also, if my light switch is going out, are light switches volt specific? Thanks.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Feb 18, 2013, 6:29 PM

Post #2 of 4 (2726 views)
Re: 1948 Desoto electrical issue Sign In
Hi neighbor again! "Are the switches volt specific?" -- IMO the 6v systems were so strong they could take 12v no problem. Guess that headlight switch is also for dimming dash lights which I think was universally a rheostat (sp?) which did make heat. For the moment I do think your headlight switch is highly suspect.

If (done it) 6v bulbs get a surge and can with a faulty voltage regulator the bulbs will blow like the old Sylvania Blue Dot flash bulbs!


Check your running voltage. Bulbs don't heal and not sure if they would shut down if voltage too high but bet not. I am, we are with you but you know there's limited exact info as to what to check where. I tend to think the headlight switch would be likely but can't be sure,

Tom (still up to our butts in snow in MA)


re-tired
Veteran / Moderator
re-tired profile image

Feb 20, 2013, 10:36 PM

Post #3 of 4 (2696 views)
Re: 1948 Desoto electrical issue Sign In
everything is gettin old , loose ,corroded connections. the headlite circuit has a auto reset breaker. It was mandated by federal govt to give someome with electrical problems in the headlite system a chance to get off highway.You may have exceded the capacity of the switch,.


LIFE'S SHORT GO FISH


blubiu02
New User

Mar 4, 2013, 1:35 AM

Post #4 of 4 (2643 views)
Re: 1948 Desoto electrical issue Sign In
In Reply To
1948 Desoto still 6 volt. Driving at night a few days ago and all the lights suddenly went out on the car. The car did not lose power. It kept driving quite nicely. 30 seconds later the lights came back on. 30 seconds later the lights went back off. This continued for the next 10 minutes until I got home. The next day I started the car and let it run for 20 minutes or so with the lights on. Nothing happened. However, I put my hand on the light switch under the panel and noticed that it was quite hot. Is this perhaps a sign that my light switch is going out? Maybe a bigger problem? Also, if my light switch is going out, are light switches volt specific? Thanks.
Had the same problem with my 37 plymouth coupe headlight switch getting hot. One of the guys in my car club suggested installing a headlight relay switch. Once installed, the only current flowing through the headlight switch is enough to activate the relay and dash lights. Works great and I've had no more problems with my 6 volt system headlight switch overheating.





 
 
 






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