Cruise Control

[mikemartin1939]

1991 SL500 cruise control is intermitent/inoperative. Replaced N4/1 module. Any ideas would be appreciated.

 

[television]

Does it ever engage at all

 

[mikemartin1939]

Yes. A couple of seconds then drops out.

 

[television]

Are the tyre sizes all correct for the car, and do you have any other warning lamps on

 

[mikemartin1939]

No other warning lights. Tires are an almost new matched set of 225/55/ZR16.
Tire pressures at 51 degrees fahrenheit are 28 psi all around.

 

[television]

This is as near as I can get to the components in your system, its not a 129 but very close,,, the hall effect part is where the speed signal is taken from and it does look to me like a speed signal problem as it will engage at times.

I will try and find something more definite

http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1992/300E/SYSTEM WIRING DIAGRAMS/4143.pdf

 

[mikemartin1939]

Television,
Thanks for the input. I will see what I can find.
Mike

 

[television]

I will try tonight to see if MB have any known answers