Question about 1998 Chevrolet Malibu

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1998 malibu headlights don't go off it might notdo it all the time I have replaced body control module @ relays but it still does it

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Might have the delay timerset to long

Posted on Jun 20, 2009

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98 cad deville headlights stay on headlight & twilight sentinel switch is off along with the ign. i'm stumped can you help. Ted


Did you check the high/ low beam headlamp relay ? Stuck contacts in side relay .Plus headlamp relay an DRL relay .All are located in the underhood relay center .
The headlamps are controlled by the body control module (PZM). The battery positive voltage (B+) is applied at all times through the HDLPS fuse at the switch side of the headlamp relay via CKT 340 (ORN).
Battery positive voltage (B+) is also applied at all times through the RADIO/PHONE fuse to the coil side of the high/low beam headlight relay via CKT 40 (ORN/BLK). Both relays are controlled by the PZM at separate output cavities.

When the headlamp switch is in the HEAD position, the instrument cluster headlamp switch input is grounded through CKT 10 (YEL) and the headlamp switch. The instrument cluster sends a request through the Class 2 serial data line to the BCM in order to active the low beam headlamps. The BCM supplies positive battery voltage (B +) to the coil side of the headlamp relay via CKT 352 (WHT). The coil receives ground through the headlamp switch via CKT 10 (YEL). The coil of the headlamp relay is then energized, closing the switch contacts. Battery positive voltage (B +) is then applied through the high/low beam headlamp relay via CKT 1346 (LT BLU) and the L HDLP LO fuse and R HDLP LO fuse via CKT 12 (TAN) to the left and the right low beam headlamps respectively.
This may sound pretty complex .
1
Was the Headlights System Check performed?
--
YES - Go to Step 2
NO - Go to Headlight System Check
2
Are the park lamps also on?
--
YES - Go to Step 3
NO - Go to Step 13
3
Connect a Scan Tool to the data link connector (DLC).
Inspect the IPC headlamp switch input.
Does the headlamp switch operate properly?
--
YES - Go to Step 4
NO - Go to Step 10
4
Disconnect the instrument cluster (IPC) connector C3.
Do the headlamps and park lamps turn off?
--
YES - Go to Step 5
NO - Go to Step 6
5
Replace the instrument cluster (IPC). Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.
Is the repair complete?
--
Go to Headlight System Check
Is the repair complete?

6
Disconnect the body control module (PZM) connector C2.
Do the headlamps and park lamps turn off?
--
Go to Step 7
Go to Step 8
7
Replace the body control module (PZM). Refer to Body Control Module Replacement in Body Control System.
Is the repair complete?
--
Go to Headlight System Check
--

Your best bet is to take it to the dealer .

Mar 18, 2016 | Cars & Trucks

1 Answer

Headlights 2000 Chevy astro van dont work they come on some times but go right off i think theirs a ground loose or some thing new battery new alternator


I'd check the headlamp relay in the under hood fuse / relay box to start . The relay is energized by the BCM - body control module !
Voltage is available to the headlamp and panel dimmer switch at all times. When the headlamp and panel dimmer switch is activated, the two following actions occur via CKT 352 (WHT):
?€¢
A headlamp enable request is sent to the body control module (BCM)


?€¢
The headlamp relay is activated

The VE1 option is equipped with automatic headlamps, which is activated when the photo sensor detects dark conditions. A code will set if there is a fault in the photo sensor, or in the two CKT's between the photo sensor and the body control module (BCM).
The coil output of the headlamp relay travels through CKT 250 (BLK) and is grounded at G101.
When the headlamp relay is activated, power is supplied to both the LH and RH headlamp fuses through CKT 1346 (LT BLU).
LO and HI beam functions are activated/determined by the multi-function switch on the steering column.
The HI beam function must be enabled by the body control module (BCM).
The headlamp power travels through the multi-function switch at the steering column and is grounded through CKT 750 (BLK).
The flash-to-pass function is also activated by the multi-function switch on the steering column. It is powered by CKT 1840 (ORN) and enabled through the body control module (BCM) via CKT 307 (YEL).

Dec 27, 2015 | Cars & Trucks

1 Answer

1998 cadillac headlights wont tern off


Check the headlamp relay in the under hood fuse / relay box . The location should be shown on the inside of the lid. Also check HIGH / LOW HEADLAMP relay in the same under hood relay / fuse box .
The headlamps are controlled by the body control module (PZM). The battery positive voltage (B+) is applied at all times through the HDLPS fuse at the switch side of the headlamp relay via CKT 340 (ORN).
Battery positive voltage (B+) is also applied at all times through the RADIO/PHONE fuse to the coil side of the high/low beam headlight relay via CKT 40 (ORN/BLK). Both relays are controlled by the PZM at separate output cavities.
Do you know what a relay is ?
How To Test Relays EricTheCarGuy

Oct 07, 2015 | 1998 Cadillac DeVille

1 Answer

2005 avalanche Fog lights are staying on with


The fog lamps are computer controlled .the body control module (BCM) will energize the fog lamp relay control circuit. The BCM receives the park lamp ON signal from the interior park lamps supply voltage signal circuit.
DTC B2527 Front Fog Lamps Circuit Low
The body control module (BCM) monitors the front fog lamp switch signal circuit in order to determine when the fog lamp relay is to be energized. When the BCM senses that the front fog lamp switch signal circuit is grounded momentarily by pressing the fog lamp switch, the BCM energizes the fog lamp relay by grounding the fog lamp relay control circuit.

Your best bet , take it to the dealer . Could need BCM replaced , would need to do testing using the Tech 2 scan tool . A new BCM has to be programmed .

Body Control Module (BCM) Replacement
If the body control module (BCM) is replaced, the following procedures must be performed in the following order:
BCM Reprogramming--Refer to Body Control Module (BCM) Programming/RPO Configuration in Computer/Integrating Systems.
Important: This procedure has to be performed only for vehicles equipped with the Passlock™ System.
Theft Learn--Refer to Programming Theft Deterrent System Components in Theft Deterrent. A new BCM will learn the Passlock™ information automatically, but the powertrain control module (PCM) must still learn the theft information from the BCM.

Mar 29, 2017 | 2005 Chevrolet Avalanche

1 Answer

Body control module


You are probably right in suspecting the body computer. There are relays for high, low, and park lamps and those relays are controlled by the body computer depending on input from the headlight and dimmer switches. You might be able to substitute a used computer or wire around it. I'm not sure if another body computer has to be programmed like the engine computer does.

May 19, 2013 | 1998 Plymouth Voyager

1 Answer

Where is the fuel pump relay on a 2008 jeep Liberty


Left side dashboard facing the door. Remove the oblong panel.

The fuse panel diagram is in your owners manual, if you don't have one, go to Jeep.com and download it for free.

Fuse Panel Description
Cavity Fuse Description
  • 1 15 Amp Blue Horn Relay, Power Sunroof Relay, Power Window Relay
  • 2 10 Amp Red Rear Fog Lights (Export Only)
  • 3 20 Amp Yellow Cigar Lighter
  • 4 10 Amp Red Headlight Low Beam Right
  • 5 10 Amp Red Headlight Low Beam Left
  • 6 20 Amp Yellow Body Control Module/Power Door Locks
  • 7 10 Amp Red Left Park Light/Left Tail Lamp/License Plate Lamp
  • 8 Spare
  • 9 10 Amp Red Right Park Light/RightTail Lamp/License Plate Lamp/ Cluster
  • 10 Spare
  • 11 15 Amp Blue Flasher
  • 12 15 Amp Blue Stop Lights
  • 13 10 Amp Red Body Control Module/ CMTC/Cluster/Pass. Airbag On,Off Indicator, Auto Daylight Mirror/Light Bar Switch (Renegade Only)
  • 14 10 Amp Red PDC Fuel Pump/AC Clutch, Starter Relay/Engine Controller/Transmission Controller (Diesel Only)
  • 15 Spare
  • 16 20 Amp Yellow Power Outlet (Rear)
  • 17 15 Amp Blue Rear Wiper



Sep 02, 2012 | 2008 Jeep Liberty

1 Answer

98 chevy prizm headlights will not go off when turned off


Does your Prizm have automatic headlights (possibly called "Twilight Sentinel" in the mfr. literature)? These systems are notoriously unreliable. Sometimes the control module goes bad for no apparent reason, while other times it fails due to a bad ground in the under-dash wiring harness. Unless you're an electrician, it's best to have it repaired by a dealer. Be prepared for price shock - the module alone is over $250 new retail, not including labor to replace it. There are several variations of the module too, so if you get a used one you need to be sure to get the right one. If it failed because of bad wiring (which was not fixed at the time of replacement), the replacement will fail too in a very short time, possibly immediately.

If you want to tackle the repair yourself, you need to know that the control module is falsely referred to in the wiring diagrams as a DRL "relay". Some Prizm models may have 2 DRL relays, one of which really is a simple relay but the other is the electronic module.

If you happen to have some knowledge of electronics, it's possible to build a bypass circuit which will completely remove the DRL and Twilight Sentinel functions (leaving your car with plain old-fashioned manual headlight control only), using parts of the failed module as a mounting and connection platform, a few wires, and three transistors.

Apr 02, 2012 | 1998 Chevrolet Prizm

1 Answer

Schematic to driver side fuse box


Cavity Fuse Description
1) 15 Amp Blue Horn Relay, Power Sunroof
Relay, Power Window Relay
2) 10 Amp Red Rear Fog Lights (Export Only)
3) 20 Amp Yellow Cigar Lighter
4) 10 Amp Red Headlight Low Beam Right
5) 10 Amp Red Headlight Low Beam Left
6) 20 Amp Yellow Body Control Module/Power Door Locks
7 )10 Amp Red Left Park Light/Left Tail Lamp/License Plate Lamp
8) Spare
9) 10 Amp Red Right Park Light/RightTail Lamp/License Plate Lamp/Cluster
10) Spare Cavity Fuse Description
11) 15 Amp Blue Flasher
12) 15 Amp Blue Stop Lights
13) 10 Amp Red Body Control Module/CMTC/Cluster/Pass. Airbag On,Off Indicator, Auto Daylight
Mirror/Light Bar Switch (Renegade Only)
14) 10 Amp Red PDC Fuel Pump/AC Clutch,
Starter Relay/Engine
Controller/Transmission
Controller (Diesel Only)
15) Spare
16) 20 Amp Yellow Power Outlet (Rear)
17) 15 Amp Blue Rear Wiper
18) 20 Amp Yellow Radio Choke & Relay
Cavity Fuse Description
19 20 Amp Yellow
Frt Fog Lights/Trailer Tow
Stop and Turn Lights
20 Spare
21 10 Amp Red Radio
22 20 Amp Yellow
Power Sunroof Relay/
Antenna Module (Export
Only)
23 Spare
24 10 Amp Red PDC Blower Motor
25 10 Amp Red Heated Seat Switches/HVAC
Control Head/Trailer Tow
Battery Charge
26 10 Amp Red Headlight High Beam Right
27 10 Amp Red Headlight High Beam Left
28 Spare
29 10 Amp Red Heated Mirrors/Rear Window
Defroster Indicator
Cavity Fuse Description
30 15 Amp Blue Heated Seat Module
31 Spare
32 10 Amp Red Wiper Switch/Front and
Rear Wipers
33 10 Amp Red SKIM Module/Data Link
Connector
34 15 Amp Blue Body Control Module/
Cluster/Interior Lights,
Hands Free Module/Radio/
CMTC/ITM Module & Siren
(Export Only)
35 Spare
36 10 Amp Red Airbag Control Module/
Occupation Classification
Module (Right Front Seat)
37 10 Amp Red Airbag Control Module
38 10 Amp Red ABS Controller/Shifter Assembly
39 10 Amp Red Hazard Flasher (Turn
Signals)/Backup Lamp
Switch (Manual Transmission
Only)/Transmission Range
Switch (Automatic Transmis

May 23, 2011 | 2005 Jeep Liberty

1 Answer

Cant to get the headlights to come on


Headlights usually work off relays or a lighting control module. Check owner manual for location of relay and call dealer parts dept and ask what controls headlights. Module or ???

Mar 02, 2011 | 1998 Cadillac DeVille

1 Answer

Horn


No the Chevy Malibu is not made by Kia!
I think you mean horn relay
I would try a new relay it is possible that the relay is defective and that's why it was removed
here is how the horn circuit works
The body control module (BCM) controls the horn relay by grounding the control circuit of the horn relay coil. When the horn relay coil is grounded, the horn relay contacts close, applying voltage to the horn via the horn supply voltage circuit.
if the horn relay does not fix your concern you may need to take it to a shop and check for any BCM fault codes
and you are correct having no horn is a SAFETY ISSUE
that car should have NEVER PASSED A SAFETY WITHOUT A HORN
hope this helps good luck and I hope the relay fixs it because a BCM is costly

Jan 23, 2010 | 2005 Chevrolet Malibu

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