P38A Starter motor fuse.

Grrrrrr · Aug 27, 2019

Hi chaps,

Today's issue is the starter motor fuse has started to blow every few starts. It started after i did the transfer box rear seal but cannot think that radio motor loom is connected?

My laptop is bust but squinting at my phone i think the fuse is only connected to the starter solenoid, alternator and the lift pump?

The car does crank. Fuse pops as the key turns or is fine, depending how it feels.

1995 DT. Ideas welcome!

Datatek · Aug 27, 2019

Grrrrrr said:
Hi chaps,

Today's issue is the starter motor fuse has started to blow every few starts. It started after i did the transfer box rear seal but cannot think that radio motor loom is connected?

My laptop is bust but squinting at my phone i think the fuse is only connected to the starter solenoid, alternator and the lift pump?

The car does crank. Fuse pops as the key turns or is fine, depending how it feels.

1995 DT. Ideas welcome!

Disconnect the starter solenoid and see if the fuse still blows. Sounds like it could be the solenoid with a partial short.

Grrrrrr · Aug 27, 2019

It is the EAS pump. 5 hours since I drove it and it was still hot. Disconnected it and no blow.

Out of the 3 spare pumps i have lying around, not a single one works! Cleaned up all connections and refitted original pump. Not quite sure what next.

Datatek · Aug 28, 2019

Grrrrrr said:
It is the EAS pump. 5 hours since I drove it and it was still hot. Disconnected it and no blow.

Out of the 3 spare pumps i have lying around, not a single one works! Cleaned up all connections and refitted original pump. Not quite sure what next.

If the pump is hot, it's running too much, either feeding a leak or worn to the point it cannot make enough pressure, even more likely, the rear motor bearing has partially seized.

Mark Piercy · Aug 28, 2019

Check the pump relay contacts just to rule out any relay sticking!!

Grrrrrr · Aug 28, 2019

Mark Piercy said:
Check the pump relay contacts just to rule out any relay sticking!!

Alteady swapped the relay for the demister!

I've a pressure guage on my tank that doesn't drop. Car doesn't drop either although i will pull the delay timer and test.

One odd thing is that using diag the comms to turn pump on or off was a bit intermittent. Might be I have a dodgy connection somewhere.

Mark Piercy · Aug 28, 2019

Have you checked the contacts in that one as well?

Mark Piercy · Aug 28, 2019

Eas box electrical connector?

Datatek · Aug 28, 2019

Grrrrrr said:
Alteady swapped the relay for the demister!

I've a pressure guage on my tank that doesn't drop. Car doesn't drop either although i will pull the delay timer and test.

One odd thing is that using diag the comms to turn pump on or off was a bit intermittent. Might be I have a dodgy connection somewhere.

If the pump does not always start using diagnostics to force it, I would look at the rear bearing assembly.

Mark Piercy · Aug 28, 2019

Datatek said:
If the pump does not always start using diagnostics to force it, I would look at the rear bearing assembly.

Belt it!!

Datatek · Aug 28, 2019

Mark Piercy said:
Belt it!!

The bearing seizes and breaks the cage, result the motor runs hot if it runs at all. If it doesn't run it blows the fuse.

Mark Piercy · Aug 28, 2019

Can the bearings be replaced successfully Keith?

Grrrrrr · Aug 28, 2019

Datatek said:
If the pump does not always start using diagnostics to force it, I would look at the rear bearing assembly.

Should have clarified, that was with multiple pumps, although some more dodgy than others.

Datatek · Aug 28, 2019

Mark Piercy said:
Can the bearings be replaced successfully Keith?

So I'm told, not had to do one yet.

Grrrrrr · Aug 28, 2019

Mark Piercy said:
Can the bearings be replaced successfully Keith?

Stuff it. I'll check for leaks and then see if Kurt can help.

Grrrrrr · Aug 30, 2019

Noticed something else this morning. Pump is smooth and producing lots of air but every so often it feels like there is a misfire, i.e. a vibration like it missed a beat. Also, it isn't cutting out until 150psi which feels a bit high?

marjon · Aug 30, 2019

150psi is correct for the storage side of the system, if my memory is still up to working right

J

wammers · Aug 30, 2019

Grrrrrr said:
Noticed something else this morning. Pump is smooth and producing lots of air but every so often it feels like there is a misfire, i.e. a vibration like it missed a beat. Also, it isn't cutting out until 150psi which feels a bit high?

150 psi is fine.

Datatek · Aug 30, 2019

Grrrrrr said:
Noticed something else this morning. Pump is smooth and producing lots of air but every so often it feels like there is a misfire, i.e. a vibration like it missed a beat. Also, it isn't cutting out until 150psi which feels a bit high?

Land Rover specify 154psi +/- 56psi which seems a bit wide to me.

Grrrrrr · Aug 30, 2019

wammers said:
150 psi is fine.

Cheers. Sure it used to stop at 140 psi in the past.

P38A Starter motor fuse.

Technician, Bodgit & Scarper Ltd

Well-Known Member

Technician, Bodgit & Scarper Ltd

Well-Known Member

Well fumbled member....

Technician, Bodgit & Scarper Ltd

Well fumbled member....

Well fumbled member....

Well-Known Member

Well fumbled member....

Well-Known Member

Well fumbled member....

Technician, Bodgit & Scarper Ltd

Well-Known Member

Technician, Bodgit & Scarper Ltd

Technician, Bodgit & Scarper Ltd

Well-Known Member

No longer with us, RIP

Well-Known Member

Technician, Bodgit & Scarper Ltd

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