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-   -   81-87 Tach Filter Photo (https://67-72chevytrucks.com/vboard/showthread.php?t=862979)

aotte1 03-01-2026 02:52 PM

81-87 Tach Filter Photo
 
81-87 tach filter location that is screwed to firewall in engine compartment photo needed. Photo of the tach filter to be provided soon, along with more photos of tach harness.
It uses a black wire to connect filter. A white wire goes through fire wall, the white wire connect to a black wire in the engine compartment.
The assembly manuals do not show filter attachment location from what I can find.
Thanks,
Les

aotte1 03-01-2026 03:28 PM

Re: 81-87 Tach Filter Photo, Harness
 
3 Attachment(s)
Photos of tach filter:
1) filter on carb;
2). Better photo filter black wire (just see connector/white wire,far right); and
3). Filter and wire harness-white wire (dirty-on right), connector to black wire.

The tach filter screws to firewall.

aotte1 03-01-2026 03:45 PM

Re: 81-87 Tach Filter, More photos
 
4 Attachment(s)
More photos of tach wire harness (not show whole harness). Connected to HEI, for testing tach in gauge cluster. It works good. Will post better photo of whole harness, soon as removed HEI. Better photos to come, know they are a mess, hard to see. Last photo close up of one part of harness..

aotte1 03-01-2026 03:55 PM

Re: 81-87 Tach Wire Harness Firewall Seal
 
4 Attachment(s)
Tach wire firewall grommet photos. This is the white wire that goes through firewall to HEI distributor.


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