Need to know what size engine.
there are a number of stereo wires but if you are installing a new stereo, it is worth buying the installation kit.it comes with a harness that will match all wires.
Begin by removing the decorative cover from your 1990 Chevy Caprice factory radio. Remove the radio retaining screws. Remove the wiring harness and the antenna cable from the back of the radio.
The alternator should be on the front of the motor with a belt on the pulley and wires connected to the back of it that can be removed.
pcv valve-location-1990 Pontiac bonnevilpcv valve on 1990 Pontiac Bonneville---location -on passenger side of engine, under alternator, push over wiring harness wires, as this maybe covering from sight.
Yes. There were no major changes between the two. NEW ANSWER: Yes it will fit. But the problem is that the 1990 computer and transmission wiring harness will not operate that 1993 model 4L60E or the 4L80E transmission. Your 1990 model had the 700R4 in it and that is not electronic controlled like the 93 is.
maybe the Altinator or crossed wires Check Your fuse box
Remove the inside of the glove box and look in and down to the right and you will see it. It has a 100 wires going to it.
Auto parts stores can sell you a trailer harness that plugs in between your existing truck harness. The electrical connection used is usually located behind the rear bumper on the inside of the left frame. Directions will come with the trailer harness kit.
distirbuitor, wires; most likley. Just go through the whole ignition system.
Don't bother trying to figure that out. The easiest thing to do is to get an adaptor harness. They're available at Walmart and most auto parts stores for 10-20 bucks and will plug right into the factory harness. The wires on the adaptor are labeled for you. All you have to do is tie it in to your new CD player. That's how I dropped a nice Sony into my 1990 F150 XLT Lariat.
The speed sensor on a 1990 Chevy Celebrity is on the top of the transaxle on the passenger side of the car. To change it unlatch and remove the wire harness then remove the two bolts that hold it in. The speed sensor can then be lifted out of the transaxle. To reinstall a new sensor reverse these steps.