Will not start after installing a light bar?

ALOHAAMBER3

MEMBER
2017 TOYOTA TACOMA
6 CYL
4WD
AUTOMATIC
115,000 MILES

Battery is good, no power to dash, won't start after light bar installation. Key not functioning either. Not even auxiliary is functioning. Fuses are all fine. What to check next?

The truck listed above is a trd pro.

Friday, May 30th, 2025 AT 7:37 PM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
54,137 POSTS

Did you disconnect something to install the light bar? With the key on, do the fuses have power? It sounds like you have a poor connection at the battery.

Please go over this guide to see what I am talking about:

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

Do any of the lights work? Dome light, headlights?

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Saturday, May 31st, 2025 AT 10:44 AM

ALOHAAMBER3

MEMBER
2 POSTS

The dome light still comes on, the key can no longer control anything on the truck, the push start isn’t doing anything, and none of the dash has power.

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Saturday, May 31st, 2025 AT 11:30 AM

KEN L

MASTER CERTIFIED MECHANIC
54,137 POSTS

Did anything spark when you were installing the light bar? I have seen the push button itself go bad but there wouldn't be any spark causing it since it is low voltage. Can you please test the fuse listed below for power?

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the images (below). Let us know how it goes.

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