GQ factory diff lock swap HELP!

Post by **CRUSHU** » Wed Dec 15, 2004 8:48 pm

I have bought a new GQ, and have swapped my diff with factory locker out of my old one, into my new one. the diff swapped over ok, i ran 2 new vacuum lines the full length of the car, the diff lock light switch (on the housing) plugged into an unused plug next to the fuel tank, all the vacuum lines in the engine bay with solenoids etc swapped over ok, and there was also an unused plug, for the solenoids. the switch in the 89 had a 3 wire connector in the dash. in the 93 there are 2 plugs, both 5 wire. i have tried the switch in either plug, but the diff lock does not lock up. i have tried reversing the vacuum lines, as i may have them arse about, but still no lock up? any thing else i have not swapped over? does it need the dash light to work? thanks for any info.

Post by **CRUSHU** » Thu Dec 16, 2004 9:40 pm

ok, i have also put in the light, and it didnt help. light doesnt come on, diff doesnt lock :cry:

any ideas??

Post by **Beastmavster** » Thu Dec 16, 2004 11:33 pm

what colours are your 5 wire connections.... I can look up the 3 wire ones ont he 88-93 model but there's no guarantee we're talking the same colours.

Post by **CRUSHU** » Fri Dec 17, 2004 6:20 am

i have both cars here still, so i can compare. i was under the inpression that it was all going to plug in, and there was 2 empty plugs there that fit. i have tried both. i have not compared colours, maybe the leter patrol has a different switch? with a light in it? that would explain the extra wires. has anyone got a 93 onwards with diff lock?

there isn't a fuse for it, and i cant find any diffences in the guage cluster, other than the globe. which i have swapped over.

Post by **Beastmavster** » Fri Dec 17, 2004 8:56 am

Mine's an 89 model so I think you've already got one on hand to compare with.

I do have a manual that's meant to cover up to 1997 so tonight I'll have a look and see if it covers your different wiring.

Off wheeling now

Post by **CRUSHU** » Fri Dec 17, 2004 9:44 am

thanks

Post by **CRUSHU** » Fri Dec 17, 2004 7:28 pm

ok, i have hooked up the vacuum lines, and the diff lock engaged. the light lit up on the dash (it is a blank brown lens. i will get some of those rub on letters from the news agent, so it will read diff lock, and be back lit, like factory) so i have narrowed it down to being that the switch is quite obviously plugged into the wrong socket. either that or the switch is different on the later ones.
still no replies on whether the later ones have 5 connectors??

Post by **CRUSHU** » Sat Dec 18, 2004 2:18 pm

still no replies :cry:

everyone must be wheelin, 'cept me :cry:

Post by **Beastmavster** » Sat Dec 18, 2004 8:40 pm

Was wheeling... but not now.....

Difflock wiring: Switch has 3 wires, difflock unit has 4 wires and there are two wires per solenoid.

Difflock switch: Yellow/Red, White, Blue
Difflock Unit: Yellow/Red, Orange, Blue, Blue and White
Difflock Indicator Lamp: Yellow/Red, Purple
Solenoid 1: White, Black
Solenoid 2: Blue/White, Black

Yellow/Red (Power) from fuse to difflock switch, diff lock unit and Difflock indicator lamp.

Blue between Difflock switch and difflock unit.

Purple from difflock indicator lamp to earth via switch.

Blue White from difflock unit to solenoid 2
White from difflock switch to solenoid 1
Black - earth from solenoids.

Hope this helps.

Post by **CRUSHU** » Sun Dec 19, 2004 9:31 am

the book doesn't say that the wiring at the switch is different on a later model??

Post by **Beastmavster** » Sun Dec 19, 2004 10:42 am

Nope - it has all the later model stuff too and the only difference is fopr the fuel injection that I can see.

There is no separate information for the difflock for the later model in my manual.

That doesnt mean that there wasnt a change, but if there was, the manual doesnt show it.

Post by **CRUSHU** » Sun Dec 19, 2004 11:20 am

ok, i will check wire colours on the 2 plugs.

Post by **CRUSHU** » Sun Dec 19, 2004 6:12 pm

ok, 1 more question. do you have a schematic of the switch? eg power to centre lower pin, blue to top left etc?? please!! this has been a great help.

Post by **Beastmavster** » Sun Dec 19, 2004 6:25 pm

No schematic - sorry (it's not a factory manual only a crappy gregory's one) - but check pm

Post by **CRUSHU** » Sun Dec 19, 2004 10:09 pm

ok, i got it to switch on (thru the white wire) but not off. must be something in the blue wire to the diff, and then back up thru the blue/white wire. maybe a bad connection at the diff plug?

Post by **CRUSHU** » Mon Dec 20, 2004 7:50 pm

OK, I still have it working thru the white wire, to the top solenoid. that leaves the blue wire to the diff. i hooked up the other solenoid with jumper wires, and it works. there is no power to it from the blue/white wire. in the dash, there is 2 connectors. the one im using has a yellow/red, a white, a blue, a black and a orange. i have reconfigured the wiring spots in the socket, so the yellow/red, white and blue are where they should be, and the other 2 are in unused spots. the difflock works the upper solenoid, but not the lower.
in the other socket, there is also a yellow/red, and a blue, a blue/white, and a couple of others. i pulled it apart, and ran blue to the switch, while using the 2 wires from the 1st socket. nothing different. then i tried with the blue/white. it made the second solenoid work, and the diff lock. there was a electrical oh shit! smell, but no smoke, and now the light does not work. the globe is ok, as i have swapped it with another. the switch did not get hot.
now the light does not work at all, even if i manually lock the diff.

many thanks to Beastmavster for all his help, but hopefully someone can shed some light on what the hell is going on. thanks

Post by **Beastmavster** » Mon Dec 20, 2004 10:34 pm

Sounding like it's too much for my brain to deal with after a few..... anything I can advise here will be highly suspicious at best.

What colour wires are at the SOLENOID end? I'm going off mine and my manual... so yours could be different.

At least we got 1 working

Post by **Beastmavster** » Mon Dec 20, 2004 10:40 pm

Refer to my previous PM.

The difflock unit has 5 wires with all these colours running from it.

The switch itself should only have 3 wires - Yellow Red, White and Blue.

Yes Im still sober enough to read a wiring diagram

Post by **CRUSHU** » Tue Dec 21, 2004 9:18 pm

ok, i have it working now. Many thanks to Beastmavster and Bazzle for their relayed pages of workshop manuals.

to summarise, so this can be added to the bible:

To transfer factory Diff Lock from an '89 GQ to my new 92 GQ I had to do the following:

Swap diffs over, easy as mine were both same ratio.
Swap Diff lock solenoid pack (carefully, as they are fragile, and expensive).
Swap vacuum tank, and lines etc into new car.
Swap diff lock unit (black box bigger than a matchbox) into new car.
Swap diff lock globe into new cluster.

Buy clips from Nissan.
Part no. 4627101G10 x 3 for vacuum pipe across firewall. @ $2.90ea
Part no. 0128100601 x 5 for vacuum parts in engine bay. @ $1.70ea

Buy 8m of vacuum hose 6mm (I think).

Plug Diff lock actuator into unused socket taped up out of the way over back end of Aux tank. Use contact cleaner to clean out trapped dust.
Install all engine bay components, and hook into the vacuum line to the brake booster, before the oneway valve.
Plug solenoid pack into unused socket taped down out of the way, between firewall, and left inner guard. Clip wiring into top gusset.
Run the vacuum hose doubled up, from the diff vacuum hoses, with enough slack for down travel, across the rear crosmember, and up the passenger side of the transmission tunnel. I had a gas line there, so I cable tied it to the line. Be careful not to let it too close to the exhaust. Connect them to the solenoid. Don't worry about which one to where, just yet.
Remove centre dash Fascia. Plug spare 6 way connector with Yellow/Red, Orange, Blue and Blue/White into diff lock unit.
**you may not have to do this next step, but I did have to**
Pull apart other spare 6 way connector, using jewlers screwdrivers to unclip it apart. Using a screwdriver from the end, lift catch, and slide terminals out the back. Reinstall them so that if facing you, you have White in the top left, Blue in the top right, Yellow/Red in the centre lower, and the Black and Purple?(maybe Orange) in any other spots, as they are unused. Plug in switch. Start car, turn diff lock on. If diff lock turns off, the vacuum hoses are the wrong way around. Reconnect them the other way. if diff lock turns on, and turns off when you turn it off, all done.

Trouble shooting: with hoses off the solenoids, the lower one supplies vacuum to the diff when lock is on. Upper supplies vacuum when lock is off.

Post by **patrolla** » Thu Jan 28, 2010 1:17 pm

anyone got another pic of a diagram? this one seems to have disappeared.

Post by **jezzaGQ** » Thu Oct 13, 2011 8:28 pm

so just to be sure those 2 wires that come off the diff are the locker engagement light wires?

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GQ factory diff lock swap HELP!

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