Relay to turn power off to solenoid

artistwantab · Nov 11, 2021

Thanks. Since I am new to this I am not going to fuss with the existing relays.

The sprinters electrical from what I have read is a bit touchy so don't want to complicate things. Thank you though for the information. Another thing to learn.

Simon47 · Nov 13, 2021

artistwantab said:
The solenoid is 12v .75 amps

Over 4 days, which is nearly 100 hours, that's 75 AHr - your battery will be too flat to start the vehicle (or if it isn't it will be by the time a week is up), and if you leave it going for longer then you'll damage the battery as well. Not to mention the hassle of sorting things out (e.g. re-coding the radio) when they've been powered off.

I'm curious what is it you need to be powered only with the key off, and why you can't do it the other way around - powered with the key on.

artistwantab · Nov 15, 2021

Simon47 said:
Over 4 days, which is nearly 100 hours, that's 75 AHr - your battery will be too flat to start the vehicle (or if it isn't it will be by the time a week is up), and if you leave it going for longer then you'll damage the battery as well. Not to mention the hassle of sorting things out (e.g. re-coding the radio) when they've been powered off.

I'm curious what is it you need to be powered only with the key off, and why you can't do it the other way around - powered with the key on.

Would not function as needed to only be on when the ignition is on.