Test TC-87A - Speed Control Switch Always Low

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION DIRECTORY table. For wiring diagram, see WIRING DIAGRAMS article.

Turn ignition off. Disconnect 2-pin SET/RESUME switch connector (located behind speed control SET/RESUME switch). Using scan tool in ohmmeter mode, check resistance of 2-pin SET/RESUME switch connector signal circuit White wire. If resistance is less than 500 ohms, go to next step. If resistance is 500 ohms or more, speed control switches are in normal range. No problem exists at this time. Perform TEST VER-4A - SPEED CONTROL VERIFICATION .
Disconnect 2-pin ON/OFF switch connector (located behind speed control ON/OFF switch). Using scan tool in ohmmeter mode, check resistance of 2-pin ON/OFF switch connector signal circuit White wire. If resistance is less than 500 ohms, go to next step. If resistance is 500 ohms or more, replace ON/OFF switch. Perform TEST VER-4A - SPEED CONTROL VERIFICATION .
Disconnect 4-pin clockspring connector. Using scan tool in ohmmeter mode, check resistance of speed control switch signal circuit at clockspring connector. See CLOCKSPRING CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 500 ohms, go to next step. If resistance is 500 ohms or more, replace clockspring. Perform TEST VER-4A - SPEED CONTROL VERIFICATION .
Disconnect Powertrain Control Module (PCM) connector. Using an external ohmmeter, check resistance of speed control switch signal circuit between 4-pin clockspring connector and PCM connector terminal No. 41. See CLOCKSPRING CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 500 ohms, repair short to ground on speed control switch signal circuit. Perform TEST VER-2A - ROAD TEST VERIFICATION . If resistance is 500 ohms or more, replace PCM. Perform TEST VER-4A - SPEED CONTROL VERIFICATION .

CLOCKSPRING CONNECTOR WIRE IDENTIFICATION

Application	Wire Color
Speed Control Switch Signal Circuit	Red/Light Green
Ground Circuit	Black/Red