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Original Message
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| RE: get out the old multimeter and start checking |
| By John - 07/04/2001 7:14:20 PM; IP 142.177.103.160 |
| Yes, RC Moser is right when he says about grounds. That is the #1 problem with any electrical fault, being it automotive or home electronic. Just a word of caution though about the use of a multimeter...use an analog one(with a needle type meter movement) not a digital one.....the digitial ones are high impedance and can give you voltages where there is enough current to have the meter show 12 volts, but a bad enough connection that there is not enough current available to drive a meter-type movement voltmeter,...or...of course...light the lights. The utility 12 volt light bulb idea is a good one. Get a wiring diagram if you can, but even without one, you should be able to figure it out. Try the headlight connector voltages with respect to chassis ground vs the headlight connetcor ground. If you have voltage that way, then it is a bad ground. If you don't.....back-up the circuit. Check voltage to chassis ground at your switch. If you have voltage there, but not at your headlights, you have a bad connection..probably in your wiring harness connectors.....look for green corrosion inside the connectors. A little Dupont M-3 or equivalent metal prep (just acid) will clean them up fine...then use WD-40 or oil or grease to keep them from corroding again. All oils are an insulator, but if the metal to metal contact if tight, the oil will be displaced to keep a connection, but yet hold back the corrosion. Wish I was there to help, but try it yourself...it's really not that hard. One further word of advice...if you use the ohmeter function of your meter to check continuity of a wire, make sure the battery is completely disconnected! If not, you could burn up your meter. |
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