only in a datsun!

[Farmer Joe]

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!

[dat521kid]

probably need to get higher amp alternator

[bonvo]

just what i was thinking

[ggzilla]

Naw, the smallest Datsun 35amp alternator can handle all those things at once. Maybe you have a bad ground wire? Or maybe corroded wire connections.

[Cuts metal like mad]

Get yourself a relay on those headligts... Direct battery power through a relay should solve this, but not a guarantee

[fastdadd]

someone told me that all the wires run off the electric system before it gets to the batt and if you rewire so it comes off batt you dont get that problem

[Llittle_Llama]

could do what i did.... (ducks tomato)

[hang_510]

cleaning the fuse box and ALL the connections, especially the grounds! should solve the issues.

 

 

or got the dwnshfter route...

[scooter]

mine was doing this till i put on a 100 amp alternator.. but i DID find some really shitty connections when i changed it over...

[72240z]

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.

[lynchfourtwenty]

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..

[DaTsUn72WaG]

If you have a bad voltage regulator it wont allow your alternator to put out as many amps as it should. which will make headlights dim and blinkers slower. i need a sew one in my 510 goon.

[banzai510(hainz)]

wack the blinker can or reseat it.

 

I would have a spare regulattor to swap in and ck that out.

 

Your system putting out near 14volts at say 1500-2000rpm????????

 

Most sytems you can tell the lights dim when you put the brakes on or heater at the high setting. esp the 35 amper alternator.

[]2eDeYe]

could do what i did.... (ducks tomato)

 

Haha :)

 

Did you relay your system yet?

[coolioni]

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.