: Dimmer switch Dilemma



lacville78
08-09-13, 02:27 AM
I recently learned from a forum member that there aren't any new dimmer switches available for the 77 Caddys that do the job properly. I tried sanding the contacts on mine, but the switch gets hotter than hell within minutes of headlight operation. I consider it a fire hazard, and at the moment consider the headlights on my car non functional. I have resorted to getting a new improper switch, but am hesitant to install it.
Are there any other options available, or is everyone rolling around with 33 year old dimmer switches?
Thanks,
Tom.

1980coupe
08-09-13, 06:18 AM
I know I am and I had my share of replacing them from other cadillacs so far so good... Just run it direct..I did that long ago on my other brougham coupe.
Just run two wires inside, one from headlights and one with power. Touch them together and you got headlights that work. Low beams if you just splice into low beam wire...

cadillac_al
08-09-13, 09:36 AM
I can not believe that switch is not available. I'm sure ebay would have some.

I just checked rockauto and they are only 3 bucks.

jayoldschool
08-09-13, 11:04 AM
When you install the new switch, set up a relay. No more burned up switches.

deVille33
08-09-13, 11:34 AM
I recently learned from a forum member that there aren't any new dimmer switches available for the 77 Caddys that do the job properly. I tried sanding the contacts on mine, but the switch gets hotter than hell within minutes of headlight operation. I consider it a fire hazard, and at the moment consider the headlights on my car non functional. I have resorted to getting a new improper switch, but am hesitant to install it.
Are there any other options available, or is everyone rolling around with 33 year old dimmer switches?
Thanks,
Tom. I do not know if they had this problem in previous model years, but it appears that the heat generated by the high beam operation was too much for the bakelite base of the switch. Same with the plastics used on the relay panel and the relay for the climate control. You often find these units melted. :crying: I wonder if a dimmer switch or the CC relay could have been redesigned with more separation at the terminals, so that the material could absorb the heat better. I have also wondered if the use of a heavier gauge wiring would alleviate this. :hmm:

carnut
08-09-13, 06:25 PM
If it lasted 33 years why would it have to be redesigned? clean connections and a new switch should be good for another 33! If the headlight wiring is marginal, and has corroded grounds then that heat would back feed into the dimmer switch. Years ago, I owned a 1937 Oldsmobile and I used the 6 volt dimmer switch with 12 volt head/taillights.

grauhst
08-10-13, 10:26 AM
Are you talking of this switch?

http://up.picr.de/15416151ix.jpg

I will install a relay, that it won't burn again.

Regards
Felix

deVille33
08-10-13, 11:34 AM
This switch is for the column mounted dimmer. The one we are discussing is the one that mounts on the drivers floorboard. :p

jayoldschool
08-10-13, 04:31 PM
They do the same thing, however. Install a relay, no more burned switches, no crispy wires, and brighter lights.

lacville78
08-11-13, 01:35 AM
Good idea thanks!