wiring headlight help

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mopardemon340

mopardemon340

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im redoing my dash and getting rid of the stock switch and making it a push button. would there be an issue with running my instrument lights, marker lights, and head lights off one switch with relays? basically i want to push one button and it turns on all my lights. headlight already has relays. and my markers are all led lights
 
"Why is there air?" Without more details, impossible to guess. However make the headlight circuit VERY bulletproof. The last thing you want, other than a steering or brake failure, is for the headlamps to fail at 60+ on a black night
 
I recall being on a very dark street when my headlights suddenly went off. 45 seconds maybe, the time it took to come to a stop and think WTH? They came back on. Happened a couple more times before I covered approx' 6 miles to home. Glad factory circuit protection is a cycling circuit breaker and not a fuse. New headlight switch cured it. If my memory serves there was no other fault found.
The draw of relays coil might never open that breaker so we've already bypassed/forfeited that feature.
I have agree with completely separate independent circuit for all those other lamps/fixtures, like factory. Just too many places for a fault to happen and take out all lighting. Although... brake lamps, turn signals, hazard flashers, might still work depending on where the fault is.
 
Maybe I am missing something here, but if you used 1 switch to several relays, (say 3) I dont see what the problem is....
You could fuse the load side of each relay, and if something shorted, it would blow that fuse....
To protect your switch, you could put a low amp fuse in each relay (solenoid side) and if it shorted, that would protect your switch...
 
Use a normally open switch to GROUND to trip the relay's coil (cavity 85). Connect the other side of the relay's coil (cavity 86) to BATTERY +.
 
mopardemon340 said:
im redoing my dash and getting rid of the stock switch and making it a push button. would there be an issue with running my instrument lights, marker lights, and head lights off one switch with relays? basically i want to push one button and it turns on all my lights. headlight already has relays. and my markers are all led lights
Click to expand...

The point I think is of course you can do it that way, but how you do it will determine how reliable it is.
Since you already have headlight relays you are already part of the way there.
 
Don't forget to include the high/low beam dimmer switch in the circuit.
 
Well i figure with my H and L beam already on relays all i would need is one more relay to handle the rest of the lights. The switch can handle up to 5 amps but recommend to not go over 3 amps with out relays. my LED lights only draw 1.3 amps. So i figure if i wire a relay i shouldn't have an issue with failure of my lights. Am i wrong?
 
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But your light load really has nothing to do with the switch load. The only load on the switch is the solenoid in the relay. The contacts in the relay carry the light load.
 
93ragtop said:
But your light load really has nothing to do with the switch load. The only load on the switch is the solenoid in the relay. The contacts in the relay carry the light load.
Click to expand...
Thays what I was thinking and y it wouldn't be an issue cause there is no load in the switch cause all the major load gos to the relays.
 
Exactly, in my mind, the only way the switch would be damaged is if the solenoid shorted out, but if you fuse the solenoid with a small fuse, that would take care of that..... But of course, you still want a fuse on the load side as well.
 
93ragtop said:
Exactly, in my mind, the only way the switch would be damaged is if the solenoid shorted out, but if you fuse the solenoid with a small fuse, that would take care of that..... But of course, you still want a fuse on the load side as well.
Click to expand...
Yea im going to add fuses to keep everything protected.
 
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