89 190 merc Auto,when cold its fine,worm it stalls when i try to manoeuvre?

Question

Its fine when cold but when it gets worn it stalls when you for instance try to turn round even if you turn up the idle speed to
i500rpm. When its in gear and you turn the power it stalls
HELP !!!

Answer 1

Possably the powersteering pressure switch has failed find it on the pressure pipe from the steering pump and test it with a OHM meter open normally: closed 0 ohms when powersteering is turned so be very carefull moving parts!get a helper to turn the steering engine running while you check the terminals at the unplugged switch. Try to get that "worm" to turn