Brant Posted October 27, 2009 Report Share Posted October 27, 2009 Like it says, they will speed up and slow downwith my speed, but its speratic. They will jump from slow to fast or the other way around. Relay, Speed sensor, electrical gremlin? And if so, where is it. Thanks in advance, Brant Link to comment Share on other sites More sharing options...
Ernie88TSi Posted October 27, 2009 Report Share Posted October 27, 2009 How does your cruise function? Does it work ok? Link to comment Share on other sites More sharing options...
JAinsworth Posted October 27, 2009 Report Share Posted October 27, 2009 When you turn on the intermittent wipers, it activates a speed controlled wiper in a small way. At a certain speed the wipers go from int. to low, my car the speed is around 45 mph....drop down below that and they return to int. mode, pick up the speed and the low speed kicks back in. There is a push button you can push to turn the "speed up" mode off so it will stay in int. mode located to the left of the steering wheel.Jimmy Link to comment Share on other sites More sharing options...
Brant Posted October 29, 2009 Author Report Share Posted October 29, 2009 I know that button but never though to push it. But what do the wipers use to guagevehicle speed? that seems like where the problem should be. Link to comment Share on other sites More sharing options...
mikec Posted October 29, 2009 Report Share Posted October 29, 2009 The speed sensor is part of the speedometer. There is a small magnetic reed switch (a dinky version of the magnetic switches you see on doors/windows for burglar alarms) next to a round magnet. The magnet spins with the speedometer input cable, closing the magnetic reed switch 4 times for each revolution of the cable. The reed switch is attached to a small bracket screwed to the speedometer... as long as those parts haven't fallen off they work if your speedometer works. When your wiper speed "goes stupid" does it go from variable speed (intermittent) mode to slow speed? Or does it sometimes go to high speed? The variable/intermittent mode can ONLY run in low speed... if your car randomly goes to full speed it's either a wiring issue with the wiper switch or the wiring at the wiper motor. The wiper motor gets +12volts when the key is ON. The wiper ON/OFF switch completes the ground to either the LOW or HIGH speed sides of the motor. ETACS uses a relay to momentarily trip the LOW speed ground for variable/intermittent mode. So a short in the HIGH wire will lead to max-speed wipers. mike c. Link to comment Share on other sites More sharing options...
Recommended Posts