If the overboost switch gets activated you'll know... it will pulse on and off and you'll feel it in the engine's power.

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

If you have no ALDA and or switchover valve then a light would be helpful I think.

I think I was too casual in my explanation of my thoughts on the light... I'm not saying to put the light in line with the sensor wire, but for the light to have its own power on one side and then ground via the sensor wire in parallel with the switchover valve.

I know people have done this, as I've seen mention of it. Just not sure where they spliced in.

-Rog