20 Most Recent 1999 Oldsmobile Cutlass Questions & Answers


When the motor was replaced , was the original PCM changed as well ? Did you have the anti-theft system programmed . Theft - system light on -DTC'S - diagnostic trouble codes are stored . Need a factory or professional scan tool read these codes . The other computers on the vehicle will communicate . BCM
Important: Due to component variability, the vehicle theft deterrent (VTD) system must have the learn procedure performed regardless, if the vehicle starts on the first ignition cycle after a VTD repair.
All codes in the theft deterrent module must be cleared for a relearn.
The vehicle theft deterrent system is designed in order to prevent vehicle theft by disabling the fuel injectors unless the lock cylinder is correctly engaged by a mechanical key. The theft deterrent system uses the following 4 components for theft prevention:
• The lock cylinder
• The ignition switch
• The body control module (BCM)
• The powertrain control module (PCM)
When starting the engine, the PCM searches for a password from the BCM through the Class 2 serial data circuit. If the password is not recognized or not present, the PCM will disable the engine. Two modes of tamper detection are provided:
• No password received
The engine will start and stall quickly. SECURITY telltale will flash on the instrument panel cluster (IPC) and then stay ON steady.
• Incorrect or disable password received (More than 3 invalid passwords are received)
The engine is disabled for at least 10 minutes and the SECURITY telltale will illuminate solid on the IPC during the 10 minutes.
After the vehicle has passed theft detection, the PCM will continue normal operation.

DTC B2947 Security System Sensor Power CKT Low
DTC B2948 Security System Sensor Power CKT High
DTC B2957 Security System Sensor Data Circuit Low
DTC B2958 Security System Sensor Data Circuit High
DTC B2960 Invalid Coded Key Present
DTC B3031 Key Decoder Device in Assem Learn Mode
DTC B3033 Security System Indicates Tamper

Does pin # 16 at the DLC have B+ voltage ?

1999 Oldsmobile... | Answered on Mar 07, 2018


There are two thermostats.

One is the Coolant Thermostat, and this regulates the circulation within the engine block, heating core and through the fan.

Then there is the FAN thermostat which is actually a switch which tells the fan to come on when the coolant reaches a critically hot temperature. This is the one that you need to replace which sounds like it has an intermittent fault. It is normally located in the radiator.

Also you need to check the fans themselves to make sure they are not faulty. Take a length of wire to the battery and cycle the fans for varying lengths of time to make sure there isn't an intermittent fault with them.

1999 Oldsmobile... | Answered on Jan 07, 2018


The lock cylinder contains the theft system sensor. A faulty sensor is most likely causing you problem. if it is scanned There should be a fault code b2960 stored in the theft system. I hope this helps.

1999 Oldsmobile... | Answered on Dec 27, 2017


Sorry yadayada ! BCM has nothing to do with these systems . Could possibly be a ground issue or they share a power supply ! Red brake light an ABS light lit on the instrument cluster , these are probably related ! Have check for DTC'S - diagnostic trouble codes . Brake lights an HVAC blower motor have different grounds . After looking at a wiring diagram and seeing where B+ voltage comes from the ignition switch . The brake light an ABS light come on when the EBCM - electronic brake control module looses B+ voltage . I 'm just taking a guess here but it could be an igition swith problem . Take it an have it checked , Test don't guess !

1999 Oldsmobile... | Answered on May 21, 2017


It is located at bottom of radiator, you will need 1/2 inch square drive or a 3/16 inch hex drive to open drain valve. Usually on pass. side at bottom end of radiator.

1999 Oldsmobile... | Answered on May 16, 2017


What bolts are you looking to remove ? Detail information would help in assisting you better.

1999 Oldsmobile... | Answered on Nov 12, 2016


Lift car on jack stands, disconnect the car battery and while under car you will find two bolts that hold it heat shield on front and back of starter. After removing the heat shield, this will give you access to the bolt against the engine on top. Two other bolts easy to get to. Disconnect wires to starter and then remove bolts. Install in opposite procedure

1999 Oldsmobile... | Answered on Nov 12, 2016


You need to test before replacing , there are three relays , the PCM - engine computer controls them . You wouldn't like replacing an find they still don't work ! Would you ? Relay Driven Dual Cooling Fan Diagnostics watch this training class ,your olds is the same ! If after watching this an your not should ,take your vehicle to a qualified repair shop !

1999 Oldsmobile... | Answered on Sep 25, 2016


The temperature of the alternator is not read by the engine temperature gage. It gets hot because it is most likely trying to charge a battery that is failing, have it electronically tested by a auto parts store like Autozone or others, it is a free test.

1999 Oldsmobile... | Answered on Jun 18, 2016


You could pull the horn fuse, that should kill it. The horn fuse is hot all the time. Two possibilities, one is security system, the other is problem with horn switch or wiring in the steering column.
The horn switch is ground for the control side of horn relay. Part of key fob security horn beep, is also a ground wire. In the diagram, you can see the two wires, The one for fob, take it loose, see if that stops the horn sounding by accident. Don't leave any live wires hanging loose, use electrical tape or something to insulate. I don't know if taking that one wire loose will cause any problems or not, I guess you can try it and see?
Of course, you still want the horn switch to work normally.
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1999 Oldsmobile... | Answered on May 14, 2016


Howdie sounds Like the fuse Or the relay is Blown Look at Replacing those and it will work again or if it has Lots Of KM,s it just might be the Fan replace it Done

1999 Oldsmobile... | Answered on Apr 25, 2015


Howdie sounds like it needs to be replaced then don,t It ?

1999 Oldsmobile... | Answered on Apr 25, 2015

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