Switching headlights over to LED's

REESE MCNEELY

MEMBER
1994 TOYOTA PICKUP
3.0L
6 CYL
4WD
MANUAL
245,000 MILES

I have the truck listed above and I have swapped over to LED headlights. I used the wiring harness that has the 2 relays in it, plugging the passenger side into the existing plug and the two plugs from the new wiring harness into the new lights. When I turn the lights on, they're either stuck on dim or stuck on hi beam. If I plug one of the old lights into the existing plug on the drivers side, it can fluctuate it from low beam to hi beam like it's suppose to do, but there's a third headlight involved then. Am I suppose to have a resistor or something else plugged into the existing plug on the drivers side? Any help will be greatly appreciated.

7 Replies

DANNY L

MECHANIC
5,648 POSTS

Hello, I'm Danny.

What brand lights are they? They wouldn't be Cougar Motor are they? Are they plug-n-play? Let me know and I'll help you fix the problem. Hope this helps and thanks for using 2CarPros.

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Thursday, May 21st, 2020 AT 12:17 PM

REESE MCNEELY

MEMBER
4 POSTS

I have the rigid industries truck lights. Yes, they are plug and play and I also put the wiring harness on it with the 2 relays in it.

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Thursday, May 21st, 2020 AT 2:28 PM

DANNY L

MECHANIC
5,648 POSTS

Hello again.

Does your truck have DRL (daytime running light) option? I would check the grounds first to see if they are providing a good connection. It sounds like there might be an internal ballast-resistor issue. Have you tried a good Halogen upgrade? I hear they work better for your truck.I will get back to you after hearing from Rigid directly. Thanks again for using 2CarPros.

Danny-

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Saturday, May 23rd, 2020 AT 8:26 AM

REESE MCNEELY

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4 POSTS

No, I do not have daytime running lights. Thank you for all your help so far.

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Monday, May 25th, 2020 AT 5:39 AM

DANNY L

MECHANIC
5,648 POSTS

Hello again.

I attached a picture that you provided in an earlier post that states "To vehicle lighting harness". This was from the wiring diagram provided to you that you've attached. I've circled in red. What location is that to be plugged into? Do you have the Rigid part number of this system for your truck? Still trying to figure this problem for you. Hope you had a great holiday weekend. Thanks again for using 2CarPros.

Danny-

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