Quote:
Originally Posted by '68OrangeSunshine
Tach wire is the one in the back [in this orientation]. The terminal we see in the ''front'' is/should be [BATT +] 12 VDC hot Ign "ON" wire from 12 volt source. I would crimp a new connector on the end to minimize intermittent contact.
In fact, if it was my truck I'd replace the blue line with a fresh 12 ga wire in red, add a Packard [locking] connector and run the feed end of the red line from IGN UNFUSED in the fuse block on the cab firewall.
You can get sets of ''Batt'' and ''Tach'' connectors, each with a color coded 12'' wire lead, for pretty cheap from Jegs or Summit. Red for BATT, Black or Brown for TACH. They slot right into the HEI cap and have extra tabs to prevent mis-connecting in the wrong slot. Jeg's p/n: 555-10552, $11.53.
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So I looked on the coil cover, and confirmed, the blue wire is the Tach and the black wire is the Batt. I think I'm going to heed the advice to run a new 12 gauge wire from the fuse block to the HEI. I'm also safe to assume the module is burned up due to undue heat from not receiving enough volts correct?