Chad
OBS Enthusiast
- Joined
- Jan 6, 2011
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i made my own wit 40amp relays and 12awg wire
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Just got some HID's for the tahoe. Installed them. 1 ballast worked. I tested the working one on the other bulb and it worked so its not the bulbs. Both worked at first but one started to flicker like a strobe light then it quit working. I do not have a relay harness, would this maybe fix that issue? I bought 2 sets of them. One to go in 97 tahoe and other in 2001 silverado. No relay and installed in silverado and they work just fine. Any Help?
1badgmc said:What is a relay harness?
A relay harness (called a dual in/dual out harness on the DDM Tuning site) pulls the power for the HIDs directly from the battery instead of from the vehicle’s wiring harness. Even though HIDs require less power to run than halogens, they do require a considerable amount of power when they are first ignited. A vehicle’s wiring is often not up to the task of handling the power requirements of that initial ignition, which can lead to misfires.
A common symptom is that only one HID will come on. The wiring has enough to handle the ignition of one light, but not both. Usually, the other HID can be ignited by turning the headlights off and then back on again quickly.
Another common symptom is the flickering of the headlights when they’re on. The power flow is not constant enough to keep them steady.
Try a relay harness.
I've installed HIDs on a '91 and a '94 with no issues to speak of. I've installed them on a '97 and a '98 and both had similar issues to what you're experiencing. Added a relay harness and voilà! All good!