Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Wiper and Washer Systems: Testing and Inspection


Poor Wiping Action
1. Defective blade(s).
2. Distorted wiper link, or worn joint.

Sluggish Wiping Action
1. Poor ground or connections.
2. Resistance increased due to twisting of link. Check operation of link motor disconnected.
3. Defective motor.

Wiper Circuit Inoperative
1. Blown fuse.
2. Poorly connected or broken wiring.
3. Defective switch.
4. Defective motor.

Motor Continues To Run With Switch Off
1. Cam plate insulator defective. Motor continues to operate when switch leads are disconnected at connector.
2. Defective switch.

Motor Stops Immediately When Switch Is Turned Off
1. Self parking points defective.
2. Defective switch.