Thread: More frequent 3 amigos with bad bumps...wheel sensor getting worse?

I wonder if that was my post that he read and it does not look like mine was a one off problem either

?????

Originally Posted by gazk

no sensor faults since I cleaned all the connectors.

How did you go about this cleaning?

Hi, I disconnected all the plugs on the sensor leads and the connections on the ABS controller. Sprayed them with electrical contact cleaner then wiped them with a rag. The contact cleaner in a spray can is available from most automotive stores, DSE and Tandy. The contact cleaner is also good for flushing oil out of a TD5 engine harness and cleaning the ECU connections.

Just had a serious case of the 3 amigos. fault identified quickly by Range-Rov as a simple relay. very happy with that result
By the way they have moved from Mitcham to Rooks Rd Vermont

Originally Posted by LandyAndy

Hi Scott.
The beauty of a rover diff
Those nissans and tojos have a substantialy bigger sized diff than yours that works just like an anchor in the sand.
Great to see the D2 excelled itself for you in the sand.
ENJOY
Andrew

Diff, na.
Think it is more like the stupid position of the Cruiser spare tyre, AND the full width bulldozer blade trying to level the track that is commonly known as the Independant Front Suspension guard on the 100.

That IRS is terrible for clearance - and the dragster rake on them doesnt help once they start to plough.

I did take off the connector to the modulator and gave it a spray with contact cleaner before I left and also pressured hosed the brakes before I left...never missed a beat at Fraser and the lights have not come on since despite racking up several thousand ks and on some very bad corrugated roads and with crap shock absorbers.

Cheers

hi everyone
sorry i have been away and unable to reply.
the connector shown on page 6 of the following article was the connector at fault. http://www.hummerknowledgebase.com/brakes/absmod.pdf

When i got my car I had an ABS wheel speed sensor fault. I had codes read and cleared and everything was fine. When this sensor would cause a fault 3 times the 3 amigos would remain illuminated all the time.

About 3 months after that I had the 3 amigos come on again, this time however they would disappear when the car was restarted. This went on for some weeks until I took the car to have the faults read. The fault was an ABS shuttle valve fault.

The SLABS computer constantly runs voltage (excuse my non technical explanation here) through the shuttle valve switches to make sure they are connected and functioning. If the connection to the shuttle valve switches is broken, the computer will detect a shuttle valve fault and log it in the computer and show the 3 amigos. Upon restart the amigos will have gone away.

Land rover began replacing modulators but the fault came back.
Land rover then replaced shuttle valve switches but the fault came back. Why? because they were replacing perfectly good shuttle valves with new ones.. but they were still plugging into the same dodgy connector within the modulator (shown on page 6 of the article).

Why do these often go off when we go over bumps? because the vibration causes the connector inside the modulator to move and break the connection - hence off go the 3 amigos.

There are several ways to rectify this - remove the modulator, pull it to bits and then repair the connector. The way I chose to rectify it was to lift up the modulator whilst leaving the brake lines connected, remove the shuttle valve switches, re-route the 2 connecting wires outside the modulator to the factory wiring loom which goes into the main connector on the modulator - hence bypassing the dodgy connector inside the modulator.

That was 5 months ago, I have not had the 3 amigos come on again. My brake pads are wearing low now and have begun squealing (for about the last 1500km)... they squeal and i go off road over bumps and down corrigated roads and no 3 amigos.

As for the other info in that article re bleeding brakes, i cant give any advice on that as we didnt need to disconnect my brake lines as the gentleman who wrote the article was spending alot more time dissecting the modulator - i posted the article as a reference as it gives good pics of where the fault lies and a reasonably good description of how to test for it.

Hope this helps
Drew