Can you count check engine light on 89-93 Mustang?
Can you count check engine light on 89-93 Mustang? Using The Check-Engine Light (89-93 Mustangs) The 89-93 Mustangs (and the 94-95’s as well as some ’88 MAF equipped Mustangs) will allow you to use a jump wire and count the check-engine light in the dash. The jump wire (I’d use spades on each end) would connect the STI (test input) with #2 pin on the connector, see below: Where are the trouble codes on a fox body Mustang? The large connector contains the self test output (STO) and ground (SIG RTN). The small pigtail is the self test input (STI)....