20 Most Recent 1998 Oldsmobile 88 Questions & Answers


I tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my jcb 3cx site-master. it wont move forward or reverse, engine is good both solenoids for forward and reverse work.
I don't have much technical knowledge but I just followed it step-wise, and works perfect! got it from www.reliable-store.com

1998 Oldsmobile... | Answered on Mar 23, 2018


Coolant Temperature Gauge
The coolant temperature gauge is also operated by 2 coils. Battery voltage is applied to both coils. One coil is grounded directly and the other coil is grounded through the engine coolant temperature (ECT) sensor. The ECT has 55 ohms resistance at 127°C (260°F). The resistance becomes greater at low temperatures. The resistance is approximately 1400 ohms at 38°C (100°F). This causes the current through the sensor and one coil to increase as the coolant temperature increases. This moves the pointer.

Probably the coolant temp sensor . have you tried that ? No, relay in the circuit .

1998 Oldsmobile... | Answered on Feb 26, 2018


Battery connections good , battery ground cable connection on the frame an engine clean an tight ? No corrosion . I wouldn't look for any ground issues under your seat . No power , main cable problem , to starter etc...

1998 Oldsmobile... | Answered on Feb 23, 2018


Is the SECURITY light lit on the insturment cluster ? Does the engine spin with key in start position ?

Vehicle Theft Deterrent (VTD) System Check

Attempt to start the vehicle.
NO - The engine cranks and starts.
Refer to Engine Cranks but Does Not Run in Engine Controls.
2
Note the security indicator while attempting to start the vehicle.
The indicator light is ON and OFF after approximately 5 seconds.
• SECURITY Indicator Always On or Flashing, Engine Does Not Crank
• SECURITY Indicator Always On or Flashing, Engine Starts
* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.

Engine Cranks But Does Not Run !

1998 Oldsmobile... | Answered on Feb 18, 2017


check youre catalatic converter it maybe stopped up.....

1998 Oldsmobile... | Answered on Jan 19, 2017


Electric trunk lock 1998 olds 88 - 1998 Oldsmobile 88 ?????????? Could you explain a little ?

1998 Oldsmobile... | Answered on Dec 16, 2016


It might not be a fuse that goes to that it might be a relay thats under your hood in the fuse box. Just a idea for you to try. Hope this works out for you.

1998 Oldsmobile... | Answered on Dec 01, 2016


Check EGR valve, idle air control, coolant temp sensor, vacuum leaks especially in hose from MAF to throttle body.

1998 Oldsmobile... | Answered on Apr 21, 2016


Cheek blower motor,

1998 Oldsmobile... | Answered on Apr 11, 2016


tune up carburetor, wheel alignment, tire balance, rotate tires, put a fuel cleanser in your gas tank. hook up to a computer for other problems related to car.

1998 Oldsmobile... | Answered on Apr 11, 2016


Cheek the battery connectors for battery acid build up, and use a wires brush to clean

1998 Oldsmobile... | Answered on Apr 11, 2016


Your ground to the battery could be bad. Check where it bolts to the frame as well as the battery possibly replacing the ends. If the car shuts off when the hot wire is disconnected from the battery then you have a bad alternator. Good luck.

1998 Oldsmobile... | Answered on Apr 11, 2016


The fuse boxes are broken up in an Olds 88 there is one under dash of the driver and passanger for mine. there also is one under my car, it looks like its been moved because of zip ties though. it was placed under the windshield fluid storage.

1998 Oldsmobile... | Answered on Apr 11, 2016


The motor could vary well be shot by the clicking noise, however, look at the relay for damage, and maybe spark it on metal if you can reach the end. otherwise, id say Motor need replacing,

1998 Oldsmobile... | Answered on Apr 11, 2016


Battery positive voltage (B+) is supplied through the LH underhood fuse block LCM/HDLP circuit breaker via CKT 242 (RED) at all times to the following components:
?€¢
Headlamp switch


?€¢
Lamp control module (LCM)


?€¢
Switch of the RH IP fuse block headlamp relay position J

When the headlamp switch is placed in the ON position, battery positive voltage (B+) is supplied via CKT 10 (YEL) to the coil of the headlamp relay position J. The coil is permanently grounded to G201 via CKT 1450 (BLK). The coil is energized and the contacts close providing battery positive voltage (B+) to the headlamp dimmer switch via CKT 1346 (LT BLU). When the headlamp dimmer switch is in the LOW position, battery positive voltage (B+) is supplied via CKT 12 (TAN) to the following components:
?€¢
Left low beam headlamp


?€¢
Right low beam headlamp The LCM provides battery positive voltage (B+) via CKT 1346 (LT BLU) through the headlamp dimmer switch to the headlamps under the following conditions:
?€¢
The ignition switch is in the RUN position.


?€¢
The ambient light sensor indicates darkness.

The lamp control module (LCM) monitors the ambient light conditions through the ambient light sensor. The ambient light sensor is a variable resistor whose resistance changes as the surrounding ambient light level changes. As the ambient light decreases, the resistance of the ambient light sensor increases. The LCM measures the resistance across the ambient light sensor and determines whether it is day or night.
Headlamps Inoperative - Low Beams (Oldsmobile)
This is a lengthy diagnostic flow chart .

1

Did you perform the headlights system check?
--
Go to Step 2
Go to Headlight System Check

2

  1. Disconnect the lamp control module (LCM) connector C1.
  2. Connect a DMM from the LCM connector C1 cavity E (RED) to ground.
Is the voltage within the specified range?
10-15V
Go to Step 3 yes
Go to Step 9 no

3

Use a test lamp in order to backprobe the headlamp switch connector from cavity D (RED) to ground.
Does the test lamp light?
--
Go to Step 4
Go to Step 10

4

  1. Remove the headlamp relay position J from the RH IP fuse block.
  2. Connect a DMM from the headlamp relay position J cavity 30 (RED) to ground.
Is the voltage within the specified range?
10-15V
Go to Step 5
Go to Step 11

5

  1. Place the headlamp switch in the HEAD position.
  2. Connect a DMM from the headlamp relay position J cavity 85 (YEL) to ground.
Is the voltage within the specified range?
10-15V
Go to Step 6 yes
Go to Step 12 no

6

Connect a DMM from the headlamp relay position J cavity 30 (RED) to cavity 86 (BLK).
Is the voltage within the specified range?
10-15V
Go to Step 7 yes
Go to Step 14 no

7

Connect a fused jumper from the headlamp relay position J cavity 30 (RED) to cavity 87 (LT BLU).
Do the low beam headlamps light?
--
Go to Step 15 yes
Go to Step 8 no

8

  1. Leave the fused jumper in place.
  2. Use a test lamp in order to backprobe the headlamp dimmer switch connector C202 from cavity C5 (LT BLU) to ground.
Does the test lamp light?
--
Go to Step 17 yes
Go to Step 16 no
Repair the open in CKT 242 (RED) between S201 and the LCM. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Headlight System Check
--

10

Repair the open in CKT 242 (RED) between S201 and the headlamp switch. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Headlight System Check
--

11

Repair the open in CKT 242 (RED) between S201 and the RH IP fuse block. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Headlight System Check
--

12

Inspect for an open in CKT 10 (YEL) between the headlamp switch and the RH IP fuse block. Refer to Testing for Continuity in Wiring Systems.
Is CKT 10 OK?
--
Go to Step 13
Go to Step 19

13

Replace the headlamp switch. Refer to Instrument Cluster Trim Panel Replacement in Instrument Panel, Gauges and Console.
Is the repair complete?
--
Go to Headlight System Check
--

14

Repair the open in CKT 1450 (BLK) between the RH IP fuse block and S308. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Headlight System Check
--

15

Replace the headlamp relay position J in the RH IP fuse block.
Is the repair complete?
--
Go to Headlight System Check
--

16

Repair the open in CKT 1346 (LT BLU) between the RH IP fuse block and the headlamp dimmer switch connector C202. Refer to

17

Inspect for an open in the CKT 12 (TAN) wiring between the headlamp dimmer switch connector C202 and S257. Refer to Testing for Continuity in Wiring Systems.
Is CKT 12 OK?
--
Go to Step 18
Go to Step 19

18

Replace the headlamp dimmer switch. Refer to Dimmer Switch Assembly - Disassemble - Off Vehicle and Dimmer Switch Assembly - Assemble - Off Vehicle in Steering and Column-Tilt.
Is the repair complete?
--
Go to Headlight System Check
--

19

Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Headlight System Check



1998 Oldsmobile... | Answered on Apr 11, 2016


There is no DRL relay , has a lamp control module .
The daytime running lamps (DRL) activate under the following conditions:
?€¢
The ignition switch is in the RUN position.


?€¢
The ambient light sensor indicates daylight.


?€¢
The vehicle is not in the PARK position.

When the above conditions are met, the lamp control module (LCM) supplies battery positive voltage (B+) to the low beam headlamps through CKT 589 (GRY), the DRL resistor, and CKT 12 (TAN). The DRL resistor reduces the voltage supplied by the LCM. The low beam headlamps light at a reduced intensity. The DRL disable if the vehicle is placed in the PARK position. When the ambient light sensor indicates darkness, the low beam headlamps automatically switch from a reduced intensity to a regular intensity.
Lamp Control Module (LCM)
In the center of the IP, below the center heater outlets

1998 Oldsmobile... | Answered on Nov 18, 2015


Yes it is a coded key, the problem is without the resistance value of the original key (the little piece of resistive wire embedded in the key shaft) you will have re-program the system to the new key value. The keys will run about $20 US each and the programming about 1/2 hr or $50. Do yourself a favor get two keys done.

1998 Oldsmobile... | Answered on May 06, 2015


Run a new fuel line before using as the old is rusted out . Very dangerous as it could catch a light.

1998 Oldsmobile... | Answered on Mar 13, 2015

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low beam headlights will not come

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