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Diff lock not engaging

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Diff lock not engaging

Postby graham1 » 12 Aug 2017 07:50

Hi guys,

I only remembered now that I had difflock issues during our last Botswana trip.
When I flicked the difflock switch the difflock light and abs lights would flash. From what I remember, the difflock light needs to burn solid hey? And what should the abs light do?

I'll start with the vacuum lines, but the abs light flashing has me confused.
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Re: Diff lock not engaging

Postby Jules » 12 Aug 2017 08:10

Graham, do a search on difflock there is a few topics about it

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Re: Diff lock not engaging

Postby graham1 » 12 Aug 2017 09:04

Yip, I'm busy trawling through all of them now :thumbup:
I can't seem to find anything about the abs light yet though, maybe I need more coffee. :)
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Re: Diff lock not engaging

Postby hugejp » 12 Aug 2017 09:14

In any situation more coffee is key!
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Re: Diff lock not engaging

Postby Peter Connan » 12 Aug 2017 12:14

ABS is disabled the moment the diff-lock switch is turned on, and the ABS light will start flashing.

Thus, the ABS light is doing what it should.
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Re: Diff lock not engaging

Postby graham1 » 14 Aug 2017 06:53

Aha, I thought that might be the case, but wasnt sure. Thanks Peter!
At least I can now just focus on the difflock itself then.
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Re: Diff lock not engaging

Postby hugejp » 14 Aug 2017 07:41

Also if the diff lock is engaged , you should hear a warning chime if you go over 25km/h
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Re: Diff lock not engaging

Postby Wilkie » 14 Aug 2017 08:09

Hi Graham
a easy way to test the difflock and to see if its working....jack the rear of your Patrol and with the car in neutral start the engine
change the two vacuum pipes , (the pipe on the rear should have constant vacuum) around on the selonoid for the diff lock and with the handbrake off turn any one of the rear wheels slowly and it should engage the diff lock and both wheels should turn together
if it doesn't engage then your problem might be in the diff
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Re: Diff lock not engaging

Postby graham1 » 19 Aug 2017 14:51

Ok, I climbed under it today. I found one of the rubber pipes had come off the rigid pipe, just above the rear axle. Reconnected it, went for a test drive, but still no lock.

I then jacked the one wheel up to test as per Wilkies advice. put in neutral and started it. Hand brake off, but the jacked up wheel was spinning, even though it's in neutral? I don't get this one? Anyway, I gently braked to stop the wheel and switched off and abandoned this one as it felt a bit unsafe.

I then disconnected the lines at the solenoid as well as at the diff and used a hand pump on them to check if they're blocked, both pipes seem clear.

I then swopped the pipes around at the solenoid, started, and within half a metre the diff was locked.

So the diff itself is fine, but now how do I trouble shoot?
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Re: Diff lock not engaging

Postby Tinus lotz » 19 Aug 2017 15:52

Spray some q20 in the solinoid it is stuck and keep doing it untill the plunger comes loose ...or contact marino he gets the terrain taimer for a good price :thumbup:
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