Hi folks

Wonder if you could give some assistance on this one, either no or very slow response from throttle fault codes present on first reading.
531 pedal potentiometer circuit track one signal incorrect- current
507 after ignition relay supply circuit short to +12v-current
535 pedal potentiometer circuit track 2 short to +12v stored
626 battery voltage short to earth

I have changed pedal and throttle motor from a good vehicle no change, codes 535 and 626 cleared but 531 and 507 will not . having read relative posts i have checked harness for breaks or damage multi plugs for corrosion, sustitusion of all relays i can find, checked fuses no difference . on applying full throttle i either get no response or a max 3500 rpm and codes 535 and 626 appear but no matter what i do codes 531 and 507 will not clear .I am starting to wonder if the code 507 may be an e.c.u. problem preventing throttle response.
any assistance would be most welcome.

Thanks

Alf