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Old 08-08-2006, 10:12 PM
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haunted headkight switch

hi all! i have a 1963 buick specia deluxe 215-2v, points, all factory stock. everything works on the car ecept one thing when i turn on the light switch everything works except when i turn light switch counter clockwise to dim instrument panel lights, the fuel gauge pegs below empty!!! i have cleaned all frame, engine, body grounds as well as headlight grounds. what could cause this. i have searched all through this site to no avail. any thoughts would be welcome. LOVE THIS SITE! BTW, i have asked this question on two buick sites with no help. thanks
keith

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Old 08-09-2006, 12:23 AM
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Doc here,

Sounds like to me, that you have a ground on the sender line from the fuel gauge..

Try this:

Remove the sender wire from the gauge, and power the car up..Which way does the gauge travel? Empty? or Full?

If it stays Empty, take a jumper wire from the sender terminal on the gauge, and ground it..Does it peg?

If that happens, look at the panel dimmer wiring at the gauge, I'll bet it is shorting over to the sender line...and using it's resistance (the dimmer rheostat) as a reporting source. Or somewhere on the sender line someone hooked a dimmer to it.

Let us know what you find..

Doc
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Old 08-09-2006, 06:49 AM
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haunted headlight switch

thanks Doc for the quick reply! i will have to pull the dash to get at the gauge. since the car has been in my family since new, i am certain noone has added a dimmer or such to the gauge line. the wiring on this car is factory original. not one wire has been added or even spliced in to. the only thing out of place right now is the headlight dimmer switch is not screwed to the floor (would that cause this problem?). i am pulling the front glass (have to fix a leak) so i will have better access behind the dash. so it appears that my dash gauge is not grounded (at the dash) properly and is finding ground through the rheostat on the headlight switch? as i progress, i will keep you posted. thanks VERY much. any more thoughts on this matter would be welcome.
keith
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Old 08-09-2006, 04:31 PM
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Doc here,

If you have a leak...I'll bet the terminals on the gauge have corroded. (or maybe even bridged a circuit from the gauge Dim to the sender line.)

To Be sure, we don't have a Syntax problem, I'm talking about Instrument Dimmers, not high/low beams..BUT..you should properly mount the switch because it can cause a high current short..

When you pull it down, remove and clean all the terminals!

Doc
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Old 08-10-2006, 07:56 PM
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haunted intake bolts

tried to find a ground wire for the dash from underneath it. i could not see a ground anywhere. i then pulled the glass where i was able to access the plug that goes into the printed circuit board. i tfollowed the ground from the plug to where it is grounded (you cannot see the little wire from underneath). now when i work the rheostat for the lights instead of the gauge pegging below empty it now sits still!!! PROBLEM SOLVED. i have searched for hours on this site and i appriciate that you and some others are motivated by a love of cars as wsll as a desire to help other folks!!! THANKS AGAIN.
KEITH
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