Questions & Answers for: Jeep Wrangler tacho

tachometer doesnt work 1990 jeep wrangler ok what engine? 2.5L , 4.0L ? 4.2L the tacho works by spark, signals and this varies by engine type. 1990 has the very odd, French REnix ECU (bendix-renix) ...

1: CMP dead. P3xxx codes. DTC's 2: CKP dead (crank sensor) 3: ignitor dead. (it drives the coil) 4: tacho line dead. (some times is just #3) hint 2 if the ASD does not close (energize) or closes for 3