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 circuit Nos. 39 and 420.

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

Fig 2: ECM Input Code EI71, VCC Brake Switch Circuit