- Jan 10, 2020
Had a tough one in the shop this week. Mid '90s White/MTD rider. Blade electric clutch won't engage. Zip tie failed and headlight wiring fell against muffler and burned it up. One of fhe ground connections for the clutch circuit goes through the headlight wiring. Clutch uses 2 relays for a hold in circuit. After fixing the headlight wiring the clutch would engage but not stay engaged when PTO switch was released to the on position using the other ground through the relays. Ground measured .2 ohms. The ground would carry current for the idiot lights, starter solenoid and carb solenoid but not the blade clutch. Ground was 14ga wire with a ring terminal attaced to the frame under the mower by the trans. Looked fine. Took it off and cleaned it, put it back on and problem solved. Couldn't find a decent wiring diagram. Spent a whole morning on this one.