Since the 4 headlight system was introduced in 1988 up gm fullsize pickups and suburbans owners of these vehicles have wondered why their low beams go off when the high beams are turned on.
High low beam relay.
For most vehicles headlights are a basic electrical system controlled by switches and relays to turn them on and off.
First study the 3 diagrams that you will use as your guide on how you want to built your wiring.
Dual high low beam headlight relay wiring harness h4 9003 with high heat ceramic plugs 4 5 out of 5 stars 182.
Left to right the horn low beam and high beam relays on my 1975 bmw 2002.
You can return the item for any reason in new and unused.
After you have all the things and tools you will use now lets make a headlight wiring relay kit.
Increase the intensity and improve the spread pattern by keeping all four lights on when in high beam mode.
Dual high low beam headlight relay wiring harness h4 9003 with high heat ceramic plugs brand.
Easy 10 minute installation.
4 5 out of 5 stars 181 ratings 102 answered questions price.
If it clicks.
Low beams are the bare minimum for safety s sake but high beams are an absolute must for night driving over 25 mph.
Listed below are the needed parts.
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This procedure includes instructions to add two relays to the early model 12v 2002s for high and low beams.
Buy painless performance 30802 high beam headlight relay kit for 1988 1998 gm full size trucks suvs.
In most cases the failure of high or low beams is due to a relay or switch problem and the troubleshooting procedure is similar to the one outlined above.
Our kit includes separate relays for the high and low beams as.
The high beam circuit does not have a relay or a fuse.
No good reason we can think of.
Free returns are available for the shipping address you chose.
If your high beams stop working here are nine of the most common causes.
Some suggest the addition of relays will improve light output by 10 15.
This video is a detailed walkthrough of the american autowire headlight enhancement relay kit.
1 measure the lenght of the wire you need from the stock wiring going to the left to right if your battery is in the right then your wiring should start in right headlamp going to left.
The difference is that some vehicles have a separate relay just for the high beams and the high beam passing or dimmer switch may or may not be integrated into the headlight switch.
Headlight tail light conversion kits.
Still to be certain i tested the relay.
