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.. Its on for maybe 40 seconds when I first turn the car on but then goes off? I changed the abs fuse because this had blown and i read somewhere they were connected? I also swapped the relay from my donor car (i know the power steering works properly on that), i tried the bypass trick aswell and that just turnned my p/s light on and it never came on for the 40secs so what else could be wrong? ... relay worked fine but ps used to cutout .. to fix i removed the relay, 2 bolts iirr .. used my dremel to clean up the contact points (even though they were a nice shinny gold colour) .. cleaned up the relay connectors for good measure , then reattached them. 
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.. Fingers crossed it works for you too 
thomp1983 wrote:You can just bypass the relay completely put both connectors on the same pole.
.. Just turned it off completely and put the p/s light on... ? , just did that sanded em all down... Connected it all back up still 40 seconds worth of p/s and off?? .. i dont have an mr2 at the mo so cant go out and do testing .. if you know your way round a mulimeter i would suggest continuity checking all the wired circuits till you find the brake (testing 12v lives and grounds too) 
.... I cut mine when I did an ECU transplant. But first port of call must be a diagnostic code. Unlike the engine ECU, the PAS ECu does not store codes, so you can only take the code when the PAS has failed and before you turn off the ignition. Of course if your PAS fails consistently then that's not an issue! ..however mine wouldn't throw a light on. Mine was the power steering ecu in the end. 
