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10-31-2004, 10:20 PM
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#3 |
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Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,553
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My crew cab has what you describe with the wire going to the coil. It is a wire that goes from the tach connection to a little metal box near the brake master cylinder on the firewall. I think it has to do with the kickdown switch on the TH400. I tapped into that wire for my tach just like you are describing.
The other possibility if that isn't what you are talking about is the little round metal can mounted on the firewall directly behind the distributor. That is a condensor (or capacitor if you want) that is there to lower the interference from the tach wire to your radio.
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Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed |
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