Brake Controller Harness for '87-91 Trucks
The rubber grommet near the red sticker passes thru the firewall near the e-brake pedal. A second pigtail harness plugs into the round 3-pin connector and splices to the controller's wiring.
http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=57184'80-86 similar
![brakeharness8791.jpg Brake Controller Harness for '87-91 Trucks
The rubber grommet near the red sticker passes thru the firewall near the e-brake pedal. A second pigtail harness plugs into the round 3-pin connector and splices to the controller's wiring.
http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=57184
'80-86 similar
[url=http://www.supermotors.net/registry/media/71718][img]http://www.supermotors.net/getfile/71718/thumbnail/trailerrelays90.jpg[/img][/url]](https://www.supermotors.net/getfile/748437/fullsize/brakeharness8791.jpg)