Topic: Help w 550k munit wiring

[Misanthropist]

Hey all, got most of my info from here, but can't seem to find my specific wiring.

I have 5 wires coming from my ignition (78 cb550) . 2 brown, 1 red, 1 black and 1 brown/white.

Key has 2 positions,  on and P (Park lights). When key is in the on pos, the red and black has continuity

When key is in the P pos, the red and one of the brown has continuity. 

Currently I have red to bat on munit and black to lock input.  But unit loses power when key is on P. I'd like to keep the switches working and have brown go to light input on mounit. But seems like this also needs to go to bat?

Thoughts?

[newday777]

Welcome to the forum Misanthropist
Sorry, I'm not a Munit person.

In the P position you should have power to only the rear taillight (on stock wiring).

[calj737]

Power the mUnit directly from the battery. Then use BLK to LOCK. That energizes the mUnit. The key RED routes to the battery per stock, that brings power to the key switch, then the BLK sends it to LOCK to energize the mUnit.

The brown wires become obsolete. The indicator controls send ground signals to mUnit then power from the mUnit to the component.

[Misanthropist]

Thanks for the reply. I just capped 2 br and 1 br/w. Ran red to battery, black to lock and battery to munit bat. Still lose power to unit when key is in P

[scottly]

The park position only powers the tail light. The key can be removed in that position. The munit has it's own version of a "park" light.

[Misanthropist]

Got it. Thought that powered all lights.  So I should cap all browns. And what will I use as the light input? I'm assuming the cluster and headlights aren't always on?

[calj737]

You configure the mUnit in the setup menu to activate Park lights, set blinker behavior, etc. TAIL allows a single wire for BRAKE and TAIL light.

You run a wire from AUX to power the cluster (stock gauges?) and the OIL and NEU lights.

[Misanthropist]

Aftermarket gauges

Also, thanks!

[calj737]

If your gauges are electronic, they will have power requirements too. You can use AUX to run a lead for those too. They will be always ON with the key.