Question about Nissan 300ZX

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I've got a 1986 nissan 300zx. Headlights (low beams) don't work and only one high beam works. I checked the voltage on both headlight and the voltage on the right side shows 12 volts but the left one only shows 5 volts. And both headlight motors aren't working. Please Help!

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There is a daytime running light module that controls both low beams and the daytime running lights. The low beam bulbs may be OK. The high beams will work fine as they are not controlled through the module.

It may be possible to disable the daytime run lights by cutting the yellow wire going into the module and then connecting it to ground. Tape off the other end.
Check the bulbs or replace one at a time to see if it works,hope this will solve your problem.

Bad bulbs?
Bad switch (high/low)

Thanks. Keep updated for any more query. You can rate this solution and show your appreciation

Posted on Oct 07, 2010

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Posted on Jan 02, 2017

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Low beam headlights do not work, but high beam headlights do


Clyde,

I've been troubleshooting this same problem on a different vehicle this week, and I can give you the steps I'd take.

1. If both sides went out at the same time, the problem is *NOT* likely to be the bulbs.

2. Check the fuses to see if both low beam lights are on the same fuse. Many cars have one fuse for low beam and another for high beam, so both lights out at the same time typically means fuse blown.

3. If the headlights are OK and the fuses are OK, then the problem is *LIKELY* the headlight switch. In my case, AutoZone has one and it can be installed easily; but in your case, that may not be as simple.

Please post your findings or comments.

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