Question about 1987 Ford Escort

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Can I put an aftermarket tachometer on a 1987 Ford Escort GT that has no RPM Module hooked up? While turning car into race-car, I accidentally cut the wiring on the RPM Module and lost the harness. I now have no tach and would like to add one. Can I do ot and how hard is it as I am a novice. Thanks Dan

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  • dandurb2000 Feb 20, 2009

    Thanks alot!!!!

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Its really easy im not to familiar with that vehicle but it all works the same if it hasd a distributer and a seperate coil or even a dis cap mounted coil either way there is two wires that run into that actual coil all you have to do is tap into them and figure out which way works just pull back the unsulation on the two wires that your tac will come with there might be 3 but one will be a ground and just kinda half way hook it up till you see the tac come to life its really easy just be patient and dont worry if the wires are wrong it wont blow anything up the tac just wont work until you hook it up right 9 times out of 10 when you buy a tach it comes with directions

Posted on Feb 20, 2009

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1 Answer

Where can i find the rpm sensor on a 2001 ford ranger


There is no tach - rpm sensor . This information comes from the PCM - engine computer .
Tachometer
The tachometer is a 6,000 rpm tachometer. It has four terminals labeled "B" (12 to 14.5V), "S" (EDIS tach signal in), and two "G" (cylinder selection grounds). The top ground (G) terminal is open on a 4-cylinder engine vehicle, and is grounded on a 6-cylinder engine vehicle.

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  • Instrument cluster printed circuit.
  • Go To Pinpoint Test F .
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Measure the resistance between the instrument cluster C220c pin 8, circuit 398 (BK/YE), harness side and ground.
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Yes GO to G2 .

No REPAIR the circuit. TEST the system for normal operation.
Measure the resistance between the tachometer and the instrument cluster printed circuit terminals; refer to the following chart:
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Yes GO to G3 .

No INSTALL a new instrument cluster printed circuit. REFER to Instrument Cluster Printed Circuit in this section. TEST the system for normal operation. G3 CHECK FOR CLEAN TACH OUT (CTO) CIRCUIT OPEN OR SHORT Check for CTO circuit open or short. Refer to Powertrain Control/Emissions Diagnosis (PC/ED) manual.
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Yes INSTALL a new tachometer. REFER to Gauges in this section. TEST the system for normal operation.

No GO to G4 .
G4 CHECK FOR CORRECT PCM OPERATION Disconnect all PCM connectors. Check for:
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Connect all PCM connectors and make sure they seat correctly. Operate the system and verify the concern is still present.
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Yes INSTALL a new PCM. REFER to Section 303-14 . CLEAR the DTCs. REPEAT the PCM self-test.

No The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
Your best bet mite be to take it to a qualified repair shop.

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