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Wayne
Wayne, Journeyman
Category: Heavy Equipment
Satisfied Customers: 8615
Experience:  34 years experiance as engine rebuild and problems.Thermo-King repair and trouble shooting.
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95 GMC: BRAKE PEDAL..aux BRAKE PRESSURE WARNING LIGHT comes ON.

Customer Question

95 GMC TOPKICK 6000 SERIES, WHEN BRAKE PEDAL IS HELD DOWN AT A STOP, THE AUX BRAKE PRESSURE WARNING LIGHT COMES ON.
Submitted: 6 years ago.
Category: Heavy Equipment
Expert:  Wayne replied 6 years ago.

wayne :

Hi I'm Wayne, I will help you with this,

wayne :

this tells me that you aux. motor is not working,

wayne :

check for power to it, with pedal on, and engine not running, if you have power , motor is bad, if you do have power, check fuse and relay in the box, one or both is bad ...............

JACUSTOMER-s25hcdkk- :

we will check that and reply, thanks, XXXXX XXXXX the 1st time we have used this

wayne :

I have gone thru this problem in our shop,sure this is the issue

wayne :

keep me posted

JACUSTOMER-s25hcdkk- :

we have 5v going to the motor, my tech said it should have 12v, we need to get a wiring diagram. i can call a dealer tomorrow unless you have one.

wayne :

if you only have 5 v, not good, need battery power 12.4, check the relay, this is most often cause, loose wires, weak relay

wayne :

No I do not have wire diagram , sorry

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