20 Most Recent 1993 Oldsmobile Ninety Eight Questions & Answers

Hi!!
Here is the vacuum diagram your requested. There are two types of vacuum diagrams, for VIN code L and 1. I've included both.

93 NINETY EIGHT EMISSION CONTROL VIN 1 W/SUPERCHARGER

93 NINETY EIGHT EMISSION CONTROL VIN L

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In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, or not seen at all. When the communication breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. (like it thinks it's being hot wired) The car shuts down because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. It will either turn off the starter, or the fuel injectors. The vehicle may run for 2-3 seconds before shutting down. This link explains it pretty well. http://www.diy-gm-security.com/ Do It Yourself GM Security bypass

Adrianne Supply 12 volts to one side of the HV Coil. Then supply 12 volts to the small wire on the starter solenoid to start the engine. Cheers

DROP THE TANK

first check your fuses if not that you might have to replace your whole single switch itself

only if you cut a hole in the floor , but I do not suggest that do to wiring and further problems. There is no access hole.

Often times the black wire is the body ground. Don't know where the junction is.

At/under each kick panel

the switch is at the end of the handle but more common to fail is the flasher unit the flasher unit will cause the turn signal light to turn on and not flash if they flash fast check the bulbs ii the flasher is a small can shaped part under the dash near the base of the steering colum there is two one for the 4 way flashers and one for the turn signals

check for short in wires going to starter and ignition switch.

It is almost definitely a bad alternator, but could also be a limited number of other things. A bad battery terminal could cause this problem as well or other loose or corroded connections. As for your 12 volt reading on the alternator, I should explain a little about electricity. If electricity travelled down a highway, the number of lanes would be the voltage and the speed limit would be the amperage and the wattage would be lanes multiplied by the speed limit. 12 lanes travelling at 2 miles per hour aren't getting anywhere fast. Also, a car battery's charge voltage slightly above its' output voltage, so it should be roughly 13.4 volts up to about 15 volts.