07-05-2021, 04:56 AM
Information from '86 , likely similar .
Brake light : yellow w/1 blue .
Front terminal #3 .
Not sure about switch location , possibly in overhead , driver's side if not under dash . Also look in left front corner , valves , etc in there .
Brake light should work with engine off , but there must be air pressure in the brake system .
I red air hose to the switch.
Meant to type : I think it's red air hose to brake light switch .
Good luck,
Hope everyone had a great Fourth !
And front terminal /fuse panel in front of passenger seat as Michael pointed out .
Brake light : yellow w/1 blue .
Front terminal #3 .
Not sure about switch location , possibly in overhead , driver's side if not under dash . Also look in left front corner , valves , etc in there .
Brake light should work with engine off , but there must be air pressure in the brake system .
I red air hose to the switch.
Meant to type : I think it's red air hose to brake light switch .
Good luck,
Hope everyone had a great Fourth !
And front terminal /fuse panel in front of passenger seat as Michael pointed out .
1986 #89
VIN 007
Detroit 8V92 TA 475 HP
Allison four speed
Chris and Sharon Hand