I know that this is something that crops up all the time (aftermarket seats, steering wheels, etc.) So what are the basics?
For example, having removed the acoustic valve and carbon canister, I'd like to replace the solenoid (of the carbon canister - acoustic valve is seemingly ok left disconnected) with something that looks neater and tidier in the engine bay (hey, I'm OCD!)
So, I used a couple of multimeters at work to measure the resistance across the contacts of the solenoid. To explain, both meters are calibrated, but neither for resistance - each produced a reading of 25.5 ohms, which is consistent and therefore accurate enough for me.
It was then pointed out by a colleague that I should take the power consumption into account.....
P=VI or, P=V^2/R
Therefore, P=(12*12)/25.5=5.6W
Based on the above, I need to replace the solenoid with resistors totaling 25.5ohms and 5.6W (or as close as).
Is the theory sound? Any experts out there, to solve my issue specifically, but to also provide some general 'rules' for others?
What about when the solenoid should actually be functioning - circumstances changed?
For example, having removed the acoustic valve and carbon canister, I'd like to replace the solenoid (of the carbon canister - acoustic valve is seemingly ok left disconnected) with something that looks neater and tidier in the engine bay (hey, I'm OCD!)
So, I used a couple of multimeters at work to measure the resistance across the contacts of the solenoid. To explain, both meters are calibrated, but neither for resistance - each produced a reading of 25.5 ohms, which is consistent and therefore accurate enough for me.
It was then pointed out by a colleague that I should take the power consumption into account.....
P=VI or, P=V^2/R
Therefore, P=(12*12)/25.5=5.6W
Based on the above, I need to replace the solenoid with resistors totaling 25.5ohms and 5.6W (or as close as).
Is the theory sound? Any experts out there, to solve my issue specifically, but to also provide some general 'rules' for others?
What about when the solenoid should actually be functioning - circumstances changed?
