enuff_zed
Lifer
I've very quickly got to the limit of my understanding and need some electrical assistance please.
N46 2.0i engine has an auxiliary water pump mounted under the air box. A hose runs into it then out to the heater, from there back to the expansion tank.
I have no hot air in the cabin at all.
I found the hoses to and from the heater to be cold. The hose running to the auxiliary pump is getting hot, but not its outlet.
I have discovered there is definitely 12v going to the pump plug with ignition on '2'.
I have also wired the pump across a battery and it runs fine.
I have done the same with a second pump. That works fine across the battery too.
Both pumps have been fitted into the car. I know they both run on 12v and I know 12v is coming out of the plug.
BUT............... neither pump will run.
What am I missing? Don't think it needs water pressure as they run across a battery ok?
I am no electrician, so although something i the back of my mind is telling me I need amps as well as volts, I have no idea how to go about checking this! Or am I barking up the wrong tree?
Help?
N46 2.0i engine has an auxiliary water pump mounted under the air box. A hose runs into it then out to the heater, from there back to the expansion tank.
I have no hot air in the cabin at all.
I found the hoses to and from the heater to be cold. The hose running to the auxiliary pump is getting hot, but not its outlet.
I have discovered there is definitely 12v going to the pump plug with ignition on '2'.
I have also wired the pump across a battery and it runs fine.
I have done the same with a second pump. That works fine across the battery too.
Both pumps have been fitted into the car. I know they both run on 12v and I know 12v is coming out of the plug.
BUT............... neither pump will run.
What am I missing? Don't think it needs water pressure as they run across a battery ok?
I am no electrician, so although something i the back of my mind is telling me I need amps as well as volts, I have no idea how to go about checking this! Or am I barking up the wrong tree?
Help?