Q: How to Replace the Underhood Fuse Box (Engine Harness) on 2000 Chevrolet Tracker?
A: To replace the underhood Fuse Box, begin by disconnecting the following electrical connectors: the intake air temperature (IAT) sensor, mass air flow (MAF) sensor, evap tank pressure control solenoid valve, evap canister vent solenoid, evap canister purge valve, throttle position sensor (TPS), idle air control (IAC) valve, power steering pressure switch, generator, starter motor, crankshaft position (CKP) sensor, exhaust gas recirculation (EGR) valve, manifold absolute pressure (MAP) sensor, g102, g103, noise suppressor filter, engine coolant temperature (ECT) sensor, heated oxygen (HO2S1) sensor, heated oxygen (HO2S2) sensor (California emissions only), oil pressure switch, camshaft position (CMP) sensor, ignition coils, fuel injector harness, c102, back up lamp switch, transmission range switch, input shaft speed sensor, 4 wheel drive low switch, 4 wheel drive switch, vehicle speed sensor (VSS), output shaft speed sensor, and torque converter clutch (TCC) solenoid/shift solenoid. First disconnect c210 and c212 and after that connect c2, c3 and c4 to the powertrain control module (PCM). Insert the harness through bulkhead grommet p100 from inside the vehicle to the engine compartment before taking out the retainers and removing the harness from the vehicle. Installation should begin by placing the harness inside the engine compartment then installing it to retainers and pushing it back through bulkhead grommet p100 into the interior. The pcm requires connection of c210 and c212 followed by attachment of c2, c3 and c4. Reinstall all electrical connectors that were detached during the process following the exact sequence of removal.