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Discussion Starter · #1 ·
Hi All,


Does anyone happen to know the wiring pin outs for the factory brake controller? Its a two connector controller. the Bigger four pin includes the power for the brake. Ive ohmed out the wiring and all seems good from harness back to 7 pin connector.
Im seeing a "99" when I manually trip the trailer brake at the dash. all fuses are good but no voltage traveling back the greenish blue wire either at the 7 pin connector nor at the connection at the brake itself, but white/ purple stripe wire at the controller does show 12v.
The is with or without a trailer connected. varying the gain doesnt change this either.

Any help would be appreciated.
 
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