Key Accessory circuit on '70 tilt
I have a 70 El Camino w/original wire harness in a sweep dash, feeding [exact year unknown] GM recycled tilt column. The install was down by a long gone mechanic years ago when I found the 're-built' tilt. Looks stock part for 70-72 GM [BPO?] and everything works [wheel is centered, horn signals, and Flasher work, except I never noticed the 'Accessory Power' not working, since I only recently installed a radio-cd.
I removed the AC vent cowl below the column which exposed the long wire plug mounted on the column and tested every terminal I could get my multimeter probe point into. As I recall, of the 8 or 10 probed, two were 'Hot'; maybe horn and buzzer or Flasher?
The remianing being turn signals and maybe be the Accessory power, but no dice with multimeter and key turned back into Accessory position.
I'll post a pic later on this long terminal or junction to see if anyone recognizes it.
Down the column and immediately adjoining is another terminal, but with maybe only 4 or 5 'ports' , but empty [no wiring].
Also, to further search for an 'Accessory Circuit', I found what I believe was my original radio power & ground feed; 3 wires: Black, Yellow & Grey. I'm guessing the Yellow & Brown were power for radio and radio lighting, with Black for ground. The ground works [tested to the cig lighter], but the others are dead.
At the moment, the only way to power up the radio, with the engine off, is to turn to the Start position. I converted to an HEI distributor and electric choke Edelbrock long ago, but it's probably not energy efficient to listen to the radio with the start circuit energized; probably not good for the coil either.
If the Accessory power was just never wired to the key switch in the tilt install or rebuild, any options to wire one in now?
Any comments or suggestions welcome- pictures will follow.