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Original 1969 T120R Wiring Harness

Winter 2005

These photos taken in 2005 illustrate the original wiring harness routing and connections on a 1969 T120R Triumph 650 Bonneville.

Well, a slight caveat. There are 3 photos (which are clearly marked below). One actually shows a British Wiring reproduction harness (identical to original apart from color of stripes on the cloth covering. The other two were taken after I moved the condensers from the horn bracket below the gas tank to the empty frame space just ahead of the coil mounting brackets. However, this move in location did not required any modification of the original harness, wires, or connectors. The wires simply went up instead of down as originally.


(Click Photos to Enlarge)

Harness Splits at Headstock: One Part to Ignition Switch and Headlamp Shell..

wiring harness making its way along the frame and through the headstock

Ignition Switch Connections

Ignition switch connections

Custom Location for Condensers *ORIGINALITY ALERT*

The original condenser location was on the horn bracket below the gas tank. I moved them, as shown in this and the next photo, to the empty space in the frame ahead of the ignition coil mounting brackets.

The harness and the wiring itself, however, were not modified: instead of the wires going down as originally, they just went up.

Wiring harness from headstock to battery carrier

DS Ignition Coil Wiring *ORIGINALITY ALERT*

Again, this photo taken after moving the original reproduction location below the tank on the horn bracket to the empty space in the frame ahead of the ignition coil mounting brackets. Harness, wires, and connectors remained unchanged.

Close-up of drive side ignition coil wiring

TS View of Ignition Coil and Condenser Pack

In this photo the condensers are in their original location, on the horn bracket below the gas tank.

Timing side ignition coil wiring also showing condenser pack.

Coil, Original Condenser Pack, Wires to Points

Condenser pack and sub-harness to points

Harness In Front of the Battery Carrier

Wiring in vicinity of battery carrier

Alternator Wires, Leads to Selenium Rectifier, Battery, Stop / Tailight *ORIGINALITY ALERT

The harness shown here is actually the British Wiring reproduction that I used to replace the original in 2006. You can see photos of that reproduction harness on a bare frame here.

Wiring loom from Timing Side

Connections to Alternator Output

Wiring harness connections to alternator output

Selenium Rectifier and Tail Light Wiring

Selenium rectifier and connections to tail light

Battery in the Carrier

Battery in battery carrier

Battery Carrier, Fuse Holder, Selenium Rectifier

Battery carrier, fuse holder, selenium rectifier