Tier 2 hall effect sender troubleshooting.
Remove the sender and plug from the vehicle.
In addition to the items below here is a link to a VIDEO
Test 1: Spin 6V test
Remove sender from vehcile
Apply 12V+ power to the red lead
Ground to the black lead.
Using a multimeter, set on DC current probe the signal wire (white) with the red probe, ground the black lead. Spinin the sender with a drill motor.
You should see 6V on the line. This is an average of the hall effect signal switching quickly from power to ground.
YES I SEE 6 V: The speed sender is operating properly. The ague may need to be calibrated or there is a break in the signal, power or ground wire to the sender. if any one of those 3 wires have an issue then the sender will not send a signal to the speedometer.
NO I DO NOT SEE 6V proceed to TEST2:
TEST 2
Apply 12V+ power to the red lead
Ground to the black lead.
Using a test lamp, apply one side to the signal and one to ground( if an LED lamp make sure the polarity is correct)
Slowly spin the sender, the lamp should blink as hte sender is turned
Do the same test with one lead on the signal and the other on power. same result should occur, lamp will blink as the sender is ritated.
YES I SEE THE LAMP BLINKING: There is a break in the signal, power or ground wire leading to the sender. Check your connections and repeat the test on the 4-pin connector.
NO I DO NOT SEE THE LAMP BLINKING. Please contact NVU tech department at 248-850-5482. Have the code HES02 available