[Tsanders]

Need help please. I had put a new water pump on car. Everything worked great. Long story made short. This was a extra car. My wife lost keys car sit up for a year. Decided to get new key. Water pump wouldn't come.on. so ordered a new one replaced it. Still won't come on. All fuses are good that I found. Battery was dead. I put charger on it. If battery is bad will it effect water pump?

[smass]

A bad battery can cause odd issues. Run the pump with the engine off to confirm it works.

Cooling System Bleed Procedure

This bleed procedure works on all vehicles with the N52, N51, N52K and N54 engine, operating with electric cooling water pump. The coolant flows through the electric water pump cooling the motor and electronics. Coolant lubricates the bearings in the pump. When servicing the pump, care must be taken not to run the pump without coolant. If the pump is removed during a repair, it should be filled with coolant to prevent the pump from seizing.


The procedure begins by connecting a battery charger to the vehicle. Fill the system with coolant via the reservoir until the proper level is achieved. It may be necessary to remove a bleeder screw on the reservoir when initially filling the cooling system on some reservoirs. Install the cap and bleeder screw if present, on the reservoir. Turn on the ignition (do not start car), set the heat to maximum and the blower on the lowest setting. Begin by pressing the accelerator pedal to the floor for at least 10 seconds; be sure NOT to start the engine. Release the accelerator pedal and within a moment, the pump can be heard during activation. While the bleed procedure is being performed, inspect for leaks. The procedure can be repeated several times as needed, turning the ignition off for 5 minutes between each bleed procedure.

[Efthreeoh]

Get a new battery. Lead acid batteries do not like to sit for long time periods uncharged. How long was the car used after the pump was installed before the keys were lost and the car sat for a year?

[Tsanders]

Car was ran for about 6 months pump worked fine.. Yes sit up for bout a year. Now pump won't work.. I've already bout another pump and installed it. Same problem won't come on. And that bleed method will not turn pump on either

[ctuna]

If the car isn't run , it will take about 3 months to totally kill the battery.
Because these cars always draw electricity even when sitting.
If you leave the car sit you need a battery tender.

[Tsanders]

I understand that part. I can get car to start. But water pump won't come on at all

[slupie]

Like posters above me said, bad battery will cause weird electrical gremlins. Replace the battery first and report back.

[Tsanders]

I will. But would pump come on with a battery charger connected

[ctuna]

You should be able to start the pump with the purge procedure
another way to do this might be to get a set of diagnostics such
as the Inpa suite along with Ista D. Anything you do to these cars
with a low battery might not be the right thing to do.

Diagnostics needed at this point I think.

[Tsanders]

Yea purge procedure won't kick pump on

[Tsanders]

How many pins on water pump plug shot be hot with a test light? I only got 1

[CTinline-six]

If the battery is that low the car might not allow the pump to run the purge?

I'd try fully charging the battery first.

[nsjames]

newtis has the wiring diagrams.

I'll caution you about stuffing probe leads into places. A lot of stuff has inbuilt PWM modules for electric motor control and can bus wires. if you short a signal wire to 12V you're gonna cook something.

[gbalthrop]

Originally Posted by Tsanders

Car was ran for about 6 months pump worked fine.. Yes sit up for bout a year. Now pump won't work.. I've already bout another pump and installed it. Same problem won't come on. And that bleed method will not turn pump on either

Originally Posted by Tsanders

How many pins on water pump plug shot be hot with a test light? I only got 1

First thing is check BOTH fuses, F02 & F09, both 30A, BOTH fuses in the E-box. Then use a DMM to test for voltage at pins #1 & #2 (Red & Orange wires) of connector X6035 at the coolant pump. Check for continuity to ground at the Brown wire (Pin #4) while you're there. Here is the wiring diagram:
https://www.newtis.info/tisv2/a/en/e...ooling/i7SHdY5

Please let us know what you find,
George

[Tsanders]

Will do thank u. I thought I checked fuse in e box but only seen one fuse. I'll look again tomorrow

[Tsanders]

Both fuses good. Orange wire has power at plug red doesnt

[gbalthrop]

Originally Posted by Tsanders

Both fuses good. Orange wire has power at plug red doesnt

You have identified the wiring or power supply issue: there should be battery power/ unswitched power (12V+) at pin #1, Red wire, of the pump connector X6035.

Since there is NOT, then you need to check for 12V+ TO the fuse, F09, electrically test the fuse itself by checking for voltage on BOTH sides of the fuse (pins #1 & #2 of X8684), and test continuity of the Red wire between F09 and the pump connector.

Fuse F09 Circuit:
https://www.newtis.info/tisv2/a/en/e...9-fuse/uPW0pg4

Location, F09 & X8684:
https://www.newtis.info/tisv2/a/en/e...9-fuse/SNEe0ZE

Please let us know what you find,
George

[Tsanders]

Have power to both fuses