Window Regulator Electrical Problem Diagnosis Help

Hi, wondered if anyone out there can give me a quick steer on this problem?

Symptoms :-
RH rear window not moving from either switch. LH rear window not moving from rear switch, but OK from front switch.

Diagnosis/testing
I swapped the RH regulator to the other side and found it works OK, so problem doesn't appear to be with the regulators.

If I stick a meter on the regulator connectors and press the rear switches on both doors I get a wildly oscillating voltage, If I do the same with the front switches I get + and - 12v. Oddly the 12v on the LH activates both regulators, but the 12v on the RH doesn't. Its like the 12v on the RH side isn't as good as the 12v on the LH side.

I've had a quick look at the wiring diagrams, and I'm guessing its an earth problem somewhere, but I have limited knowledge and I guess it could be a switch, relay or even ECU issue.

Any advice greatly accepted....

Mark. Melbourne. Oz

I tapped the relays and her presto, all works again...

happy days, glad it worked out cheap. might be worth buying replacement relays to have ready for when it happens again and tapping them won't work.

ive got an issue with mine but when you use switch you hear somthing goin on but window wont budge
ive bought a new regulator and want to know if i have to remove from door before i fit new cable
looks a bit fiddly in there lol
any info would help

Try the switch first..they fail a lot...swap it with a window switch you know works.

thanks but its defo the regulator

got a haynes manual so hopefully it shows me in there
looks a headache

can anyone point me in the right direction of the correct relays for door and elec window motors
thx once again

replace window regulator