Wiring And Switch
- Leave wiring harness connected for the following tests. Connect a test lamp between terminal "L" and ground with switch in "LOW", then connect lamp between "H" and ground with switch in "HIGH". Test lamp should light and motor operate in both positions. If motor does not operate, but lamp lights, check brushes. If lamp does not light, check wiring and switch.
- To check brushes, connect a jumper from battery to terminal "L", and from "P2" to ground. Motor should run at low speed. Leave battery jumper connected and move ground jumper from "P2" to "H". Motor should run at high speed. If motor runs, problem is in switch and wiring. If motor does not run, brushes are the problem.
- If motor does not stop, disconnect wiring and connect a jumper from "P1" to battery, then a second jumper from "L" to ground. Motor should stop and park. If so, control switch is faulty. If not, replace gearbox assembly.
- If motor will not park properly, disconnect wiring and clean terminals. If problem still exists, turn switch "OFF" and connect voltmeter between "P1" and "L". If voltage is present, check between "P2" and "L". If no voltage is present, between "P2" and "L", replace gearbox. If no voltage is present at all, check switch and wiring.
- Disconnect wiring at switch. Check switch terminal continuity using the following chart.2-SPEED STANDARD SWITCH CONTINUITY
Switch Continuity Position Off B to P1 A to Ground Low B to A P2 to Ground High B to A H to Ground (1)P2 to Ground (1) With ohmmeter positive to Ground and negative to P2. With leads reversed, high resistance should be present. If resistance is the same in both directions, replace switch.