Electronic Speed Sensor Module Test

Number harness terminals from 1 to 6 (or 8), starting with terminal 1 nearest the locator key. With ignition switch "ON", connect negative voltmeter lead to ground and touch positive lead, in turn, to terminals 1, 4, and 6. Battery voltage should be indicated in each test.
If less than 12 volts is indicated, service harness as necessary. If all tests are satisfactory, and problem still remains, replace electronic speed sensor module.