Something in there should help, since you posted 77 450 in the title and 77 550 in your post.
Redoing 77 550 SS AND HAVE WIRING BUGS.. NO BRAKELIGHT.H/L BEAM NOT WORKING. AND BACK BLINKERS LIGHT NO BLINKING AND FRONT BLINKERS DON'T LIGHT.. IN Headlight bucket have 1 single blue and 2 red wires not hooked to anything. So far hit and miss if I growing 1 ignition wire of. Blinker light brite..think some wires are crossed in bucket..help and thanks
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1977 CB750 (acquired project)
1979 CM400T (rider),
1979 CM400T (resting)
1980 CM400T (just picked up in pieces)
1981 CM400T (in surgery receiving transplant)
1982 CM450 (donor engine for 81)
1982 CB450 (parts bike)
1985 VT1100C (rider)
Past rides: Vincents, Triumph, BSA's, Suzuki's, Twingle, Corgy, others.
Remember, today is the tomorrow we worried about yesterday.
My chest fell, but, fortunately, my belt caught it.
I don't know everything, nor, have I met the one who does.