Tach problem in my 93 - TDR Roundtable

Tach problem in my 93

07-22-2002, 03:08 AM

#1 (permalink)

paccool

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Join Date: Mar 2000 Location: CA USA Posts: 1,736 Old Reader's Rigs Gallery

Tach problem in my 93

Posted this in the first gen section but thought I'd try here as well in case some former first gen owners see it and can help.

I had a set of gauges installed about 1 1/2 years ago at Camping World. The boost and Pyro work good, they could never get the tach to work. I tried a different tach, I replaced the crank position sensor. I talked with Piers a few weeks ago at the Norcal get together and he said there had to be a special harness installed or it wouldn' t work. ordered a new harness, found out there was one installed already, replaced it in case the filter was blown.

Tomorrow night I'll check for 12 volts to the tack, the ground is ok as the light works.

My question is - does anyone know what the signal is on the gray/ blue wire at the plug for the tach? I want to be sure there is a signal coming from the ECM. If there is, the problem almost has to be a bad tach. Also want to be sure the installer didn't short something out under the dash.

Anyone out there know anything about this problem? HELP!!

__________________
Stan
93 2WD ex.cab,Twins- PDR HX-35/HT-3B,56psi boost,PDR stage 2 ported head,PDR cam,3200 GS,DD stage 3 Injectors,ATS ported manifold,4" RIP exhaust,Pyro,boost,tranny temp gauges,Mopar tach,5" inlet w/AFE filter & Old Smokey mount,auto w/3.54 rear,DTT 89% converter, modified fuel cone, Mag-Hytec on Diff/tranny.

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