so PULLING CODES I hooked up a speaker wire into little green single block AND connected it to negative on battery & when I turned ignition on all the lights came on EXCEPT NO ENGING LIGHT , wtf , do I need thicker wire?? any ideas THANKS

 

I'm trying find out why my car still jerks when secondaries kick in, starts great , idles great , runs great on primaries , I put new fuel filter in , I'm trying to pull codes to see if tps setting NARROW , or open but no code light , wish I never adjusted top idle screw now it was running great IM LOST

 

So I checked light build on dash , no light build used the handbrake light bulb still no check engine light coming up so I can check codes , any way to check codes WITHOUT USING dash check engine light??????

 

What YEAR are we working on? Theres a very good chance that the secondary’s are seized and need to be rebuilt

 

No secondaries arnt seized becoz it was running beautifully and boosting hard until I adjusted top idle screw , I guess I'll have to try make a LED tester to pull codes to see if TPS IS NARROW or OPEN , becos my check engine light not working on my 1989 turbo series 5 , the little green 1 point plug by battery is the right one to earth & get codes aye ? What's the 6 point green plug for ??? the exhaust overheat light comes on , but no check engine light bulb , so I put boot hatch light bulb that was working in check engine spot and still check engine wouldn't come on to pull codes, WHAT DOES EXHAUST light mean???