Hi I am trying to pull the code off my 90 b2600 as the check engine came on at about 200.000 miles. My understanding is you ground the green plug with the single wire thats under the hood by the wiper motor, then run a jumper wire from the A terminal to the B terminal of the other green plug thats next to it then turn ignition on and count how many times the check engine light flashes. Mine doesnt flash just stays on. Ant help would be greatly appreciated thanks.

 

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thank you very much