Thread: Noise from abs modulator...?

No noise isn't good. If car is sitting for a long time, it will flatten the battery.

Noise something like a pulsing at high frequency is normal.

Mine does it, been told its normal.

Have heard it described as a "Space Invader" sound perfectly normal and if your battery is in good nick wont flatten unless over a long time. 300milliamp draw I think.
Cheers Scott

A very quiet ticking sound like an electric clock is normal i've been told..

Electronic woop, woop is perfectly normal. I noticed it when I bought the car new in 2002. Never caused a flat battery. The batteries in my D2 last 4-5 years.

Cheers

Originally Posted by benji

Also, would anyone know if a weak shuttle valve would cause the traction control to be weaker than it should? My cousin basically has the same problem on his 02defender. When the axles are crossed up in mud the tc isn't strong enough to break traction on the other wheels.

It's unlikely to be the shuttle valves. The shuttle valves respond to pressure in the lines from the master cylinder (ie when you press the brake pedal) and switches between two "circuits" the brake fluid travels along depending on whether the brake pedal is pressed or not. The valves also activate the shuttle valve switch to signal the SLABS ECU when the pedal is pressed.

The portions of the Modulator that are used when the TC is running are the return pump, and the outlet and inlet solenoid valves.

cheers
Paul

A Space Invader, that's it! We worked out it's in 6/8, and it's in D# major, andante.

Cool, thanks guys.

Just got to sort out the tc. The tc on my 93 classic is more effective - so something is amiss.

You can here it working but it's just got no bite to it, if you lifted a wheel on the flat the etc won't get it going.