Jump to content

only in a datsun!

Farmer Joe

Recommended Posts

so ive got this problem with my wiring. its not really a problem you could say, just something that really annoyin.


so at night when i have my headlights on, when i push the brake, and the brake lights turn on, the headlights dim. they almost turn off sometimes.


then, when i have my headlights on, and i use my turn signals, the headlights dim every time the signal strobes.


and also, when i turn my heater fan on to high setting, the headlights dim. the combination of the heater and the brake light is what makes the headlight almost die out.


now is all this caused by the heater, tail lights, turn signals and wipers all being on one primary circuit?


now i know that anything can be done, but how hard would it be to isolate all these things to where the all get power separately?


id just really like the truck to be a little bit more enjoyable at night.


thanks a bunch!

Link to comment
  • Replies 14
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

I agree with others that it sounds like bad grounds/connections. A higher output alt sometimes solves the problem but only because it makes up for the power being leached out.


I would break out the multimeter and spend and afternoon checking every connection before spending money to band-aid the prob with a new alt.

Link to comment

my truck does the same kinds thing but my lights dont die out, then jus dim a little when something is turned on like the heater or brakes an the also mildly blink with the blinkers.. its prolly a bad ground, these datto's are natorious for bad grounds, i havent really drivin my truck much since i replaced my alt, an voltage reg. pretty much after i fixed that stuff i went directly to a clutch / tranny job an havent completed that yet.. but im sure my truck will still do the same shit..

Link to comment
  • 4 weeks later...
  • 2 weeks later...

I had a similar problem, what fixed it was putting new battery cables in.

They were all corroded.

When I had my lights on, my car steroe would not work, and when i had the wipers on it also turned the steroe off.

Then my low beams both went at the same time, and all I could use were my brights.

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.