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What do #'s like 86a mean?
Terminal # = function
15 = Switched positive output from battery
30 = Postive output direct from battery (+)**
31 = Direct to battery negative ( - ), ground
31b = Return to battery negative via switch or relay
49 = Positive input for turn signal flasher
49a = Turn signal flasher trigger power to switch (54); marking used after /5
54 = Turn signal switch contact from flasher (49a); marking used on /5
85 = Relay trigger wire, generally for negative/ground winding on electromagnet**
86 = Relay trigger wire, generally for positive winding on electromagnet**
86a = Path to ground via neutral switch with diode (prevents "NEU" from lighting via clutch switch [contact 86] )**
87 = Normally open relay output, generally**
87a = Normally closed relay output
87b = Second normally open relay output on a seperate throw
www.airheads.org/content/view/159/49/