ShadowsPapa
Well-Known Member
- First Name
- Bill
- Joined
- Oct 12, 2019
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- Runnells, Iowa
- Vehicle(s)
- '25 JTMX, '23 JLU 4xe, '82 SX4, '73 Javelin
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- Retired auto mechanic, frmr gov't ntwrk security admin
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The "harness" as it/s said here, with the relay and connectors for the tail light harness and the license plate harness only impacts license plate lights - nothing more.
The brake light in the tail gate comes into the tail gate at the rear of the bottom of the bed into the bottom of the tailgate and the wiring for that isn't touched.
The brake light system isn't touched at all other than the piece that goes between the factory connectors. That only "taps" the backup light wire and the ground wire.
When the back up lights are on, it energizes the relay coil and opens the contacts in the relay.
The rest of that "harness" connects only to the license plate light wiring that sits on top of the left frame rail near the spare tire heat shield.
So if you have a brake light error or issue, it's either a connection issue in that wiring that fits there, or unrelated.
Since it only interrupts the license plate lights and nothing else, the load change is so extremely minimal, it's not going to be seen or detected in any way. There's no sensing for those.
Brake lights are controlled by the ABS, so if it's a brake light error, it's unrelated to tail lights or license plate lights other than perhaps a connection issue at the piece you plug in behind the left tail light.
The brake light in the tail gate comes into the tail gate at the rear of the bottom of the bed into the bottom of the tailgate and the wiring for that isn't touched.
The brake light system isn't touched at all other than the piece that goes between the factory connectors. That only "taps" the backup light wire and the ground wire.
When the back up lights are on, it energizes the relay coil and opens the contacts in the relay.
The rest of that "harness" connects only to the license plate light wiring that sits on top of the left frame rail near the spare tire heat shield.
So if you have a brake light error or issue, it's either a connection issue in that wiring that fits there, or unrelated.
Since it only interrupts the license plate lights and nothing else, the load change is so extremely minimal, it's not going to be seen or detected in any way. There's no sensing for those.
Naw, otherwise you could never turn them off via any type of system. You can unplug them and although not "legal", it's not going to get noticed.
Brake lights are controlled by the ABS, so if it's a brake light error, it's unrelated to tail lights or license plate lights other than perhaps a connection issue at the piece you plug in behind the left tail light.
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