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Q & A: Improper wiring connections

Monday January 02nd, 2006
Q & A, MGA, MGB, MGC, MG T-Type, Midget
Ref:
1) Official MGB 1975-1980 Workshop Manual, Section Na.12, page 246.
2) Tech Tips in Moss Restoration Parts & Accessories Catalog MGB-16

John,

1. I would like to solicit your help in identifying the proper connections
for the two (2) wiring harnesses that connect to the Transmission on a
1977
MGB w/Overdrive.

- I can account for all the connections on Harness #1....... to the Rev
Switch, OD Inhibit Switch, OD Switch on Gear Shift, and OD Solenoid, which
is consistent with the wiring diagram in Ref 1) (above)

- The problem is with Harness #2 that connects the "Vacuum Advance Relay"
(on the Break Pedal Box) to the "Micro Switch" (mounted on the
Transmission). There are two (2) wires (a Yellow/Brown and a White/Brown)
in this bundle with no apparent place to terminate. Note: There are
"bullet
connectors on both ends of both these wires, plus there is connector
sleeve
on one end of the yellow/brown wire.

- Ref 2) indicates the yellow/brown wire goes to ....Drivers's Seat Belt
to
Time Delay Buzzer; however, I do not see any place in the transmission
tunnel (under the car) to make this connection.

2. Any advice you have to offer would be greatly appreciated.

Regards,
Paul!

Let's start at the connection between the main harness, the rear
harness, and the gearbox harness, located at the rear of the right front
inner fender. There is a four-way Lucas female connector which receives<... read more