T120 WIRING DIAGRAM AND SWITCHED POWER

[Espanolito]

Hello all,

Looking for the best switched source on my 2017 Triumph T120 to tap into for a PDM60 power hub.

Attached is a wiring schematic for the T120. The yellow wires seem to be the ignition switched. Looks like my options are:

1) The yellow from the Brake/Tail Light that also runs to the Front Brake Switch, the Front Side/Running Light and the Bluetooth Module Connector. This yellow originates directly at the ignition switch.

2) The yellow from the USB Charging Point Connector (I assume this is the USB under the seat). This originates at the fuse box (fuse 9) and just goes to the USB Charging Point Connector.

I am also replacing the OEM horn with an aftermarket one that draws more amps. I'll be supplying the new horn from the PDM60. That means that I won't be using the B/BL (blue/black) that supplies +12v switched to the horn. This B/BL is taking power from the yellow that runs into the Front Side/Running Light (number 1 above). As I will not be using this B/BL +12v to the horn, can I just extend that back with a spade connector extension to the PDM60 for switched power? Would save me from having to tap into the yellow somewhere else.

 

[Espanolito]

Hello all,

Looking for the best switched source on my 2017 Triumph T120 to tap into for a PDM60 power hub.

Attached is a wiring schematic for the T120. The yellow wires seem to be the ignition switched. Looks like my options are:

1) The yellow from the Brake/Tail Light that also runs to the Front Brake Switch, the Front Side/Running Light and the Bluetooth Module Connector. This yellow originates directly at the ignition switch.

2) The yellow from the USB Charging Point Connector (I assume this is the USB under the seat). This originates at the fuse box (fuse 9) and just goes to the USB Charging Point Connector.

I am also replacing the OEM horn with an aftermarket one that draws more amps. I'll be supplying the new horn from the PDM60. That means that I won't be using the B/BL (blue/black) that supplies +12v switched to the horn. This B/BL is taking power from the yellow that runs into the Front Side/Running Light (number 1 above). As I will not be using this B/BL +12v to the horn, can I just extend that back with a spade connector extension to the PDM60 for switched power? Would save me from having to tap into the yellow somewhere else. View attachment 51932

Correction: The wire in option #1 does not go to the Bluetooth Module Connector (hard to follow the little lines). It just goes from ignition switch to Brake/Tail Light, Front Brake Switch and the Side/Running Light.

 

[Qship]

Wouldn't be better to feed direct from battery with a fuse in line? CANBUS system on modern Triumphs are sensitive to voltage draws that exceed set parameters.

 

[Espanolito]

Wouldn't be better to feed direct from battery with a fuse in line? CANBUS system on modern Triumphs are sensitive to voltage draws that exceed set parameters.

Certainly much cheaper! Does the 2017 T120 hava a CANBUS system? I don't see it anywhere on the schematic (although I probably don't know what I'm looking for).

 

[Qship]

If you're not familiar with CANBUS(I am no expert), here's a link to a decent explanation; CAN Bus System: Understanding the Basics
Pretty sure your T 120 would have this system.
Even the extra current draw you will use with your new horn may affect it unless you go through your power hub hooked direct to battery. If you tap into the existing wiring you are going to alter the currents in those and possibly cause electrical issues.
Use a relay hooked to your power hub or direct to battery for your new horns. You can use the existing horn wiring to trigger the relay without altering currents

 

[Espanolito]

If you're not familiar with CANBUS(I am no expert), here's a link to a decent explanation; CAN Bus System: Understanding the Basics
Pretty sure your T 120 would have this system.
Even the extra current draw you will use with your new horn may affect it unless you go through your power hub hooked direct to battery. If you tap into the existing wiring you are going to alter the currents in those and possibly cause electrical issues.
Use a relay hooked to your power hub or direct to battery for your new horns. You can use the existing horn wiring to trigger the relay without altering currents

Thanks Qship. I guess you aren't much in favour of tapping into wiring, then?

I was also thinking of adding a Denali B6 tail/brake light for added visibility. But it does have three wires: switched power, brake and ground. Ground can go to battery, but the other two need to be tapped into the rear light. Alternatively, if the hub is installed, the switched power can come from the hub. But yes, the hub has to tap into switched power somewhere anyway.

That said, that is why I was thinking of using the B/BL on the horn to run switched power back to the PDM60 (so that I wouldn't have to tap into any wire). The horn would then run off the PDM60.

But of course, taking the PDM60 out of the equation, I would install the horn direct to the battery via harness with relay / inline fuse. The horn is only 5 amps and 'plug and play' (unlike air horns) but I would still install it either with a relay/fuse or through the PDM60.

 

[Qship]

No problems tapping into wiring, just don't want to see it cause anyone problems down the road. Better to have as much info as possible before attemping mods/improvements.