service engine light remote starting

Tach is not relevant to your problem but ignition 2 (white) is....make sure your connection is working good with your multimeter, also...you should get a bypass module like PLJX from Bypass kit or others because installing a fix resistor is really unstable and can trigger the check engine light.  You should also feed the second accessory wire(Brown) using the small orange (-) output to trigger and external relay.  I came accross GM vehicules the needed the brown wire to be connected.

Let me know,

Today I wired the 2nd accessory so we will see if the code goes away.  I double and triple checked the 2nd ignition and its good.  The resistor bypass works fairly well as I have done that type of bypass for a while and not one has let me down, its getting the correct resistance so I dont believe thats the problem.

Did you use the pink/white for your second ignition?  If you used the negatives outputs to trigger an external relay, if you own a Directed Bitwriter, check the negative output timing, make sure it triggers as soon as the receiver receives the signal and not later.  There is a timing issue between the blue and blue/black wire...if my memory serves me right, I believe that the blue wire activates faster than the blue/black.