Notes On Intermittents

Check brake switch for proper adjustment. Check for intermittent open between fuse No. 7 to brake switch and then from brake switch to ECM. If fuse No. 7 blows intermittently, check for short to ground in circuits No. 39 and 420.

Fig 1: ECM Input Code EI71, VCC Brake Switch Circuit Schematic

Fig 2: Flow Chart, Input Code EI71, VCC Brake Switch Circuit