Britbike forum Forums Thread Like Summary - 1978 T140 wiring loom

Does anyone have any photos of the wiring loom layout for a 1978 T140 showing under tank and under seat routing of the loom please.
Many thanks Mike

The harness passes through the LH frame grommet behind the steering head and runs along the underside of the main spine tube, and then follows the LH seat rail (marked yellow) where it splits into branches at various locations.
One goes behind the LH inner panel, another CORRECTION: two (the second on the opposite side is not in the picture) feed through the coil mounting plate (for coils, condensers, rectifier, battery connections etc.) another goes across the front of the battery compartment to the Zener...


...and continues along the RH seat rail to the RH indicator connection that disappears into the mudguard.


Another continues along the LH seat rail (where it connects to the tail lamp section and LH indicator...


...that disappears into the mudguard)...


Edit:...where the wires are clipped (clips usually rusted away) along the inside of the mudguard and continue to the protector plate (not the indicator wire as that exits the mudguard elsewhere).

It is, but that's the way it was done.

I find it easiest to install the grommet over the wiring harness off the bike (I believe that most new harnesses come with grommets in situ), then feed the back end of the harness through the hole in the gusset, then "worry" the lip of the grommet in the frame gusset with your fingers or a BLUNT instrument.

My throttle and choke/enrichner cables are both two into one so I completely assemble the 2-1 barrels/junctions, then feed the single cable through the grommet from the back/inside.

Cheers,

Steve