Brake Warning Alarm Always On. Chevrolet Express 1998

GM Service Manual Online

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1998 🢒 Express 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Brake Warning Alarm Always On

Step	Action	Value(s)	Yes	No
1	Disconnect the connector at the P/B booster fluid pressure alarm switch. Disconnect the connector at the P/B booster fluid flow and pressure alarm delay module. Connect an unpowered test lamp between P/B booster fluid flow and pressure alarm delay module connector cavity C for the LT GRN (966) wire and B+. Does the test lamp light?	--	Go to Step 2	Go to Step 3
2	Repair the short to ground in the LT GRN (966) wire between the P/B booster fluid flow and pressure alarm delay module and the P/B booster fluid pressure alarm switch. Does the alarm stop?	--	System OK	--
3	Replace the P/B booster fluid flow alarm switch. Does the alarm stop?	--	System OK	--

Step

Action

Value(s)

Yes

Disconnect the connector at the P/B booster fluid pressure alarm switch.
Disconnect the connector at the P/B booster fluid flow and pressure alarm delay module.
Connect an unpowered test lamp between P/B booster fluid flow and pressure alarm delay module connector cavity C for the LT GRN (966) wire and B+.

Does the test lamp light?

Go to Step 2

Go to Step 3

Repair the short to ground in the LT GRN (966) wire between the P/B booster fluid flow and pressure alarm delay module and the P/B booster fluid pressure alarm switch.

Does the alarm stop?

System OK

Replace the P/B booster fluid flow alarm switch.

Does the alarm stop?

System OK