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on and off tachometer

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icelandic
Posts: 158
Joined: 10 Jul 2007, 05:51
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Location: Sao Paulo- Brazil

Post by icelandic »

The tachometer on my 95 850 stopped working properly. Funny thing is that after driving for a while and turning off the engine, once you start up sometimes it works correctly for a while and then stops again. The crankcase sensor is new OEM as well as the cam position sensor. Anyone knows where I should start investigating?
Thanks.
1995 859 auto NA

Ozark Lee
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Post by Ozark Lee »

I would start by going to diagnostic mode 3 on the instrument cluster itself. The flywire goes to port A-7 and then press the button three times. At that point all the gauges should read at their midscale positions except for the temp gauge which should go to the bottom of the red.

Beyond that you are going to need to trace things with an ohmmeter to find the bad wiring or a bad connection.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

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