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Post by Ryan Verthein on Oct 28, 2008 21:46:08 GMT -6
Corsa Dash Temp gauge Troubleshooting guide This is for 65-66 dashes. EM Spyder dashes will be the same except for Wire color / placements System Check with COLD engine: 1 with key "ON" is gauge" Always over 600 f = good 12vdc to gauge / no ground Rises to over 600f = shorted lead to Thermister / shorted T-M. Needle moved but under 200f = gauge funtioning / open circuit to thermister / T-M bad Thermister / wiring checks 2 wire plug behind dash / Black with light green stripe should read 4,000-6,000 ohms to GROUND High Temp lead from T-M should read 4-6k ohms Thermister should read 4-6k ohms Gauge Checks With Dash Harness unplugged: Black / lt Green wire to dash [ 2nd pin in from row across from open hole] to Black / Purple wire in plug [ 2nd pin over from empty hole] should read 50 ohms [ gauge good ] with dash harness pugged in / key ON and T-M disconnected you should see 10 VDC clear back to T-M.
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