Only the headlamps are brightened by putting in a relay harness. If you want the rest of the lights brighter/working better, check/improve the grounds at all four corners of the car, make sure the feed wires and all connections are in good condition, and do like this.How does this system affect the tail lights? Will they become brighter?
I used these as well. Bought a pack of spare relays as well.
Interesting. Is that a 4 headlight separated high and low beam assemblies or a 2 headlight hi/lo combo?81110-60P70 is what I got. Bought direct from a Toyota dealership. 30+ bucks. Place was a brand new facility here by I-90 in Austinburg. Cleaner than some hospitals…wow.
I just got my 2 light Toyota kit today. I got it off ebay out of Richmond KY.Interesting. Is that a 4 headlight separated high and low beam assemblies or a 2 headlight hi/lo combo?
So, that's a 2 headlight system as in hi/lo in each headlight?I just got my 2 light Toyota kit today. I got it off ebay out of Richmond KY.
Other than the power connections being a little small and the bulky cover, I think it's pretty nice.
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81110-60P70 is what I got. Bought direct from a Toyota dealership. 30+ bucks. Place was a brand new facility here by I-90 in Austinburg. Cleaner than some hospitals…wow.
How does this system affect the tail lights? Will they become brighter?
Yes, those are it.
I looked on the eBay’s link, it doesn’t say anything about if it would work on a four headlight system, do you know if it would?H4 9003 Headlamp Wiring harness conversion Kit socket Relay Wiring Headlights | eBay
This is a Universal Harness with relay kit they work great on vehicles with h4 connection also headlights such as 7 round,and 7x6" Halogen H4 Headlight Relay Harness with Hi Heat Ceramic Plugs for Cars & Trucks with 2 Headlights - HI and LOW Beams.www.ebay.com
Just be aware… those kits are made with 16 ga. wire…tried one on my Dart with PIAA halogen bulbs…30 secs and the wires were warm to the touch. I’d stay away!Conversion kits with relays all over Ebay for $10.
I would think it does not , believe those would be differentI looked on the eBay’s link, it doesn’t say anything about if it would work on a four headlight system, do you know if it would?
From what I have read up on , this is the norm for headlight wiring below , doesn't mean I did enough research , just what I have read , but if I have issues I will change out and use a better 14 gauge ground wire to see if it resolves an issue as you describe , I do have one installed on my 79 f100 with better halogen lights and haven't noticed a hotter than normal wire but will check better to see if it has issues after running longer than I have before , on the 72 Duster I am going to use JW Speaker led headlights , and will be checking those more closely when I get to try them out for the first timeJust be aware… those kits are made with 16 ga. Wire…tried one on my Dart with PIAA halogen bulbs…30 secs and the wires were warm to the touch. I’d stay away!
Maybe my PIAA bulbs (60/55W) draw more current than std. halogen lamps. I did notice Crackedback’s kits use 12 gauge wire?From what I have read up on , this is the norm for headlight wiring below , doesn't mean I did enough research , just what I have read , but if I have issues I will change out and use a better 14 gauge ground wire to see if it resolves an issue as you describe , I do have one installed on my 79 f100 with better halogen lights and haven't noticed a hotter than normal wire but will check better to see if it has issues after running longer than I have before , on the 72 Duster I am going to use JW Speaker led headlights , and will be checking those more closely when I get to try them out for the first time
- 18 gauge wire for the high beam
- 16 gauge wire for the low beam
- 14 gauge for the ground connection.
there are more on ebay for dual headlights , if you searchI would think it does not , believe those would be different
Shouldn't. Separate circuits. Yes the tail lights are on with the headlights, but are on the marker circuit coming out of the headlight switch.Do you mind sharing the price?
Relays are probably 40A, minimum 30A, so the relays should last for decades. Should use circuit breakers on at least the low beams as a blown fuse can leave you without. A circuit breaker will reset and lights come on again.I also made my own, but have a relay for each filament. (4 relays)
If one relay feeds both low beams and one feeds both hi beams, then the loss of one relay takes out both lights.
Didn’t like that idea much.
Also all headlights are now 10 ga. wire including the grounds.
Dash lights probably due to less current draw so less voltage drop through the switch. I doubt the tail light difference would be noticable.I have Crackedbacks harness in my '69 from a couple of years ago. Not sure about the taillights, but will definitely brighten your dash lights up. Would like to do my 2 other cars, but I am not into making it up from a pile of parts.
Lots of those are chinese crap. Easy enough to make your own with Bosch relays and American or European made fuse folders. The less Chinesium we use the better. China is a hostile adversary, so we do not want to support it if possible.there are more on ebay for dual headlights , if you search
Relays are probably 40A, minimum 30A, so the relays should last for decades. Should use circuit breakers on at least the low beams as a blown fuse can leave you without. A circuit breaker will reset and lights come on again.
Ran into the circuit breaker kicking out on a Vauxhaul after I installed halogen headlights. Of course they went out only after getting on a dark country road going home. I fixed that with one relay for left hi beam and one for right hi beam with a 30A fuse for each side. The original wire to the high beam can be removed from the socket and installed on the relay control circuit, 85 or 86. Then run a 10 ga wire from the 87 to the hi beam socket position.
Electric fans draw a lot of current so a 40A relay and fuse should be used with 10ga wires from power to the fuse, from fuse to relay and then to the fan. The control circuit can be 16ga as it requires very little current. A 200° temperature switch will turn it on and off. Other temperatures are available, but should be 10° to 15° warmer than the thermostat.
I do like fuses coming from the power supply to the relays, just in case.I had thermostat controlled electric cooling, but I was getting ready to add AC so I pulled it all and went with a more capable radiator and clutched 7 blade steel fan.
Originally these cars had a basic circuit breaker built into the headlight switch, but they are a bi metal type and works basically like a old school signal flasher ( but slower)
Using headlight relays basically makes it useless anyway.
I don’t have fuses or circuit breakers on the headlights.
Relays only, and very well insulated and protected wiring.
Each of the four relays are 30 amp.(overkill) for sure.