Theta

The following How-To covers the explanation and repair of the Parking/Emergency Brake Hardware and Control Unit and includes specifications, schematics, etc.

These How-To guides are neither endorsed by or property of Corvette Forum or myself in any way/shape/form. All liability stemming from any actions taken in relation to these guides is solely placed upon the user.

We hope you will find these guides useful.

Theta

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MIGHTYM0USE

thank you for this. i have blown 2 fuses in a row (second one popped key off engine off just by attempting to install it)

i guess something wrong with the module since not much else to the system.

Theta

Yikes! As you probably know from looking at this, the switch is your garden-variety momentary with lighting and diode protection. The CAN/LIN (Edit: GMLAN) bus communication between the cluster and the module are low-level logic, so nothing that would pop 30A fuses.

Sounds like the module went bad, or you have a short to ground on power wire 1492 or 742.
.

MIGHTYM0USE

thanks!

if im reading correctly the red/light green power wire goes from the fuse all the way back to the module

and the yellow 12v arm is same from switch all the way to module as well.
the switch did feel a little sticky but it could just be in my head

first i will do is verify ground at the fuse block pin.
i don't suppose you know where connectors x311 and x313 are on the car?

i was surprised to not find a relay in the wiring?

MIGHTYM0USE

i have ground at beginning of 742 at the fusebox terminal and i have ground at the plug at the module. so perhaps the module is ok but why is my red/lt green grounded and where..

Theta

You can check the K83 (Park Brake Control Module) pins to see if the module has internally grounded itself due to a fault.

Pin A - RD/L-GN - Circuit 742 - Battery Positive Voltage

Pin H - BK - Circuit 2050 - Ground

While the cable is disconnected, you can also check at the wiring connector. You'll know which one is at fault after doing this (the wiring or the module).

MIGHTYM0USE

well after unluckily starting from the rear i worked my way to the front and found good old red/light green shorted to the header.

be advised this bundle was not tucked away well and i missed it during header install a month or so ago

Theta

The good part about testing from the module is knowing which one to start checking. Although, I see your point - you went from the back to the front.

I'm glad you found the issue, at least! Far better than having to replace a module.

MIGHTYM0USE

thanks again!

Detroit Steel

Great topic for How-To Tuesday!
https://www.corvetteforum.com/how-to...-module-368093

hairymeister

Thanks. Now to pull this up in my garage.