Cruise Control Voltage?

[Steve S.]

Hi All,

I've just spent a happy couple of hours investigating my cruise control on my Galaxy(2.8 V6 1997)It's not worked for a few months and I felt this was the time! Anyway I'm basically checking the switch functioning as per the Bentley manual using an AVO meter.It all checks out switchwise but the vacuum pump won't run on the car(it does on the bench connected direct to a 12v battery.)I notice however that my AVO reads only 5volts on all the tests, eg the supply to the c/c unit multiplug is 5v as are all the other readings.If I test a footwell bulb for eg it is a good 11.8v.It is only 5v at the pump multiplug also.Anyone explain why this is the case or am I missing something basic? Any help greatly appreciated as usual.

Regards,

Steve.