12 Volt electric choke current - please explain!
Thread Starter
Intermediate
Joined: Oct 2019
Posts: 33
Likes: 4
From: England
12 Volt electric choke current - please explain!
I wish I understood electrics better!
If I measure the voltage at the wire connector to the electric choke when it is not connected, it reads 12v ignition on. If I connect the wire and then measure the voltage at the choke male connector it's attached to, I only get 5.2 volts! If I take another ignition source of 12 volts from under the hood and do the same, there is only minimal drop! I understand that the choke is pulling current when connected but why the different reading? Does anyone know why?
I think the 12 volt choke supply comes from or via the CCC system on this car (1980 Californian) so is it to do with less amperage from the CCC than the battery? The choke does seem reluctant to open the choke butterfly on 5.2 volts.
If I measure the voltage at the wire connector to the electric choke when it is not connected, it reads 12v ignition on. If I connect the wire and then measure the voltage at the choke male connector it's attached to, I only get 5.2 volts! If I take another ignition source of 12 volts from under the hood and do the same, there is only minimal drop! I understand that the choke is pulling current when connected but why the different reading? Does anyone know why?
I think the 12 volt choke supply comes from or via the CCC system on this car (1980 Californian) so is it to do with less amperage from the CCC than the battery? The choke does seem reluctant to open the choke butterfly on 5.2 volts.
Racer
Joined: Apr 2006
Posts: 477
Likes: 43
From: Millbrae California
the reason you see 12 volts with the choke not connected and 5.2 volts with it connected is the choke relay is most likely bad or the relay is not receiving the signal to turn on. the current you are getting to the choke when the relay is not turned on is coming thru the choke light in the instrument panel. Most often a new choke relay will solve the problem but sometimes the signal that turns on the choke relay is the problem (most often a oil pressure switch so the choke does not open until the engine is started).
I hope this helps Henry @ oles carb
I hope this helps Henry @ oles carb
