B8

B8 DETERMINE WHETHER THE CONCERN IS INTERNAL OR EXTERNAL TO THE ELECTRONIC HYDRAULIC CONTROL UNIT (EHCU)

- Key "OFF."

- Connect the EEC IV 60-Pin Breakout Box.

- Connect a jumper wire between pin 2 of the breakout box and chassis ground.

- Key "ON."

Is the red brake warning indicator illuminated?

> Yes
B10

> No
B9