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P0703 Diagnostic Trouble Code Discussion for March 2011

Brake Switch Circuit 2 Malfunction

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Trouble Ticket Help Requests for DTC P0703
Help Request Posted
1995 Buick Park Avenue 3.8L Poor Fuel Economy VIN: 1G4CW52K0S
P0703: Brake Switch Circuit. Diagnose any of the mentioned codes and come up with bad ECM replaced the ECM and all the same symtoms and codes. Scan data shows a bad Quad Driver 1. Disconnected and checked all wiring to the ECM and sensors/actuators from the ECM and all check fine. I can g...
March 29, 2011
1995 Buick Park Avenue 3.8L Misfire VIN: 1G4CW52K1S
P0703: brake sw ckt. ... back through the intake on acceleration. There is NO Check Engine light on, but it works during key on bulb check and a total of 19 DTC's in current codes, none in history codes. Cleared codes and they all came back. p0703, p0501, p0755, p1361,'p0101, p161...
March 29, 2011