Rebuilt motor, coolant pump comes on as soon as the battery is connected.

torbearfree

Private
Jan 2, 2020
41
10
0
ETA: Ground cable was connected to the wrong ground. Coolant pump is quiet now.

Yesterday I connected my battery for the first time in 2 months, coolant pump came on as soon as it was connected.

I needed to charge the battery so disconnected the wiring harness going to the coolant pump.

This morning I disconnected my charger from the battery and measured the voltage on the 4 pin connector for the coolant pump. 1 was 0 volts and the other 3 were 0.1 volts. I saw that as good.

I disconnected my battery to installed the connector and as soon as I reconnected my battery, the pump turned on.

I need to purge the cooling system but I cant do that until I can manage the coolant pump.


Any ideas?
 
Last edited:

torbearfree

Private
Jan 2, 2020
41
10
0
I am 99% sure my MSD81 is toast. Later today I will head to JY to get a used one. All of the other errors I have all relate to the MSD.
BT software cannot connect to engine module, INPA shows errors when I try to input the injector values, DBC and DME errors, etc.