Gq Rd28t Speedo issues

[mad66]

So my speedo works then doesn't work, went for a rwc today a got pinged for it, works 99% of the time. 95 gq Rd28t anyone had the same issue.

I haven't looked underneath yet and don't even know if it is cable driven or electronic. What is the first thing to check? Cheers

[mudnut]

Many things to check, simple things first. The sender is basically an AC alternator driven off the transfer case ( rear top Drivers side of the Transfer case). Open the connector and check that the lugs are clean and the wires in good condition. Clean around the sender and use a spanner to undo it. Get someone to spin the sender shaft while you have a multimeter (set on AC volts) connected to the lugs. It should read a few volts. If all good, refit it and make sure the connector is pushed together properly.

After removing dash surrounds, the cluster comes out of the dash easily. Check all of the looms to make sure the connectors are in good condition. There are a few threads dealing with repairing some common instrument faults.

Threads such as these http://www.nissanpatrol.com.au/forums/showthread.php?38587-GQ-dash-cluster-dicky

http://www.nissanpatrol.com.au/forums/showthread.php?27775-GQ-Speedo-reads-overspeed-sometimes

The search function is your friend.

[mad66]

Thanks mudnut, that info should sort me out. I did notice that the oddometer didn't work as well when the speedo went down so that suggests to me that the sender from the gearbox may have a bad or dirty connection or maybe faulty. I think I will start there first. Cheers:smiley_thumbs_up:

[mudnut]

Failing that, follow the earth wires from the cluster and check they have a good connection to the body.

[mad66]

I went over a bump today "road work trench" when the speedo was down and odometer down. I was watching and as soon as I had the jolt the speedo went up to 60, so It is a bad connection. havn't had time to have a good look yet.

[kbchez]

Sounds logical, i have same problem. On off speedo.

[mad66]

I am going to get stuck into it tomorrow, see how I go.

[mudnut]

mad66 I am interested in what you have found, so far. I have amended #2 to say the speedo sender is located on the transfer case instead of gearbox.

[mad66]

To be honest I haven't had time to look at it yet, had a lot going on and couldn't get to it but now I have a chance to see what is going on. I will report back once I have got off my ass and had a look.

[kbchez]

I had a look at the speedo sender unit grabbed the wires wiggled them. Speedo has been working heaps better. Thats all i have done so far

[mad66]

I had a look at the speedo sender unit grabbed the wires wiggled them. Speedo has been working heaps better. Thats all i have done so far

Thanks mate good to know. I am about to get of my ass and fix it, will be checking both ends. Cheers

[garett]

yeah not always the sender and being a nissan its prob the dash. nissan suck at making dashes that work.
had the same thing on my gq, hit the dash and it worked for awhile. when that stopped working i swapped out the dash all good. ( mind you i tested the signal from the sender behind the dash first)
since then i have found out that 1-2 components on the circuit board fail. if i could ever be bothered i should fix my old one.