Question about 1999 Renault Megane

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Which is the relay for rear wiper on renult megane1999 as they are not marked and book dosen't explain

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It looks like it will be a plug and play, if they are identical. You can either swap/switch them and see if it resolves the issue with the rear wiper or simply replace one with a new one and plug it in and see what happens. Obviously if you switch them around and it works, than you know that it is defective, remove it and replace with a new one. Hope this helps

Posted on Nov 27, 2014

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2002 trialblazer rear window wiper inop. changed switch and motor. no power to motor. cannot find relay nor fuse

There are something's involved that you are not aware of , or familiar with . Electronic control modules .
Rear Wiper/Washer System Controls
• Body control module (BCM)
• Liftgate control module (LGM)
• Rear wiper/washer switch
Do you know what a serial data network is ?
Rear Wiper/Washer System Operation
The rear window wiper/washer switch is an input to the BCM. The requested rear wiper mode is sent to the liftgate control module (LGM) by the BCM as a message on the serial data circuit, and the rear window wiper motor is controlled by the LGM. The switch power circuit to the rear wiper/washer switch is a 12-volt reference supplied by the BCM during ignition on, accessory or RAP power modes. The rear wiper/washer switch is a series of resistors and the switch position is determined by the voltage of the rear wiper/washer switch signal circuit to the BCM. The rear wiper/washer switch has continuity at all times and the BCM expects a rear wiper/washer switch signal voltage in all switch positions including OFF. The rear wiper motor is supplied battery positive voltage and ground. The LGM controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the LGM. The duty cycle of the pulse width modulation determines the rear wiper motor operating mode. The liftglass and liftgate ajar switches are inputs to the LGM and must be in an inactive state in order for rear wiper washer system operation to be enabled. When an ajar switch is active the LGM suspends wiper motor operation directly and sends the ajar switch status messages over the serial data circuit enabling the BCM to suspend washer pump operation. The rear window washer pump is controlled by the BCM through the rear washer relay. Battery positive voltage is supplied to the coil and switch sides of the rear washer relay. When the rear window wash request is active the BCM energizes the relay by grounding the relay coil through the rear washer relay control circuit. When the relay is energized battery positive voltage to the relay switch is supplied to the washer pump control circuit.

Your best bet , take it to a qualified repair shop and have it checked for DTC'S - diagnostic trouble codes .
DTC B1017 or B3970
The rear wiper motor is supplied battery positive voltage and ground. The liftgate control module controls rear wiper motor operation through the rear wiper motor control circuit. The rear wiper motor control circuit is supplied a battery positive reference voltage by the rear wiper motor module and is pulse width modulated to ground by the liftgate control module. The duty cycle of the pulse width modulation determines the rear wiper motor operating mode.
DTC B3799

Turn the ignition ON.
Operate the rear wiper switch through all the switch positions.
Does the rear window wiper operate normally?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3
Install a scan tool.
Display the liftgate control module data list.
Observe the following parameters while operating the respective switches. Refer to Scan Tool Data List for typical values.
• Liftgate Ajar Switch
• Liftglass Ajar Switch
Did the scan tool indicate the correct switch positions?
Go to Step 4
Go to Courtesy Lamps Inoperative in Lighting Systems
Observe the requested rear wiper parameter in LGM data list.
Operate the rear wiper switch through all the switch positions.
Does the scan tool indicate the correct requested rear wiper parameter in relation to the switch position?
Go to Step 5
Go to Step 6

Feb 06, 2017 | 2002 Chevrolet TrailBlazer

1 Answer

Does the rear wiper operate on a "relay fuse" located under the hood?

Hi Heather, The link below shows a rear wiper down relay and a rear wiper up relay as well as a rear wiper fuse which I marked with a black dot , I hope this helps..... CHEERS..


Apr 16, 2016 | 2000 Ford Explorer

1 Answer

99 isuzu rodeo where are the rear wiper relays

one more silly easter egg hunt, seems that is all we get.
and guess what most cars have no such thing.
ill pretend you did say that, and said
"my rear wipers are totally dead. why." HARK A REAL QUESTION.?
A fuse blown.
marked rear/wiper washer 10 amps.
there is no relay have schematic here.

poof i the pudding.... below.


Apr 10, 2016 | 1999 Isuzu Rodeo

1 Answer

Rear wiper doesn't work

check rear wiper fuse and relay.if wiper motor getting power but do not work.rear wiper motor bad.if fuse and relay okay but no power going to rear wiper rear wiper switch could be bad.

May 14, 2013 | 2000 Seat Ibiza

1 Answer

2009 Saturn Vue. Rear Wiper and Washer both stopped working at same time.


Feb 09, 2013 | 2009 Saturn VUE

1 Answer

Ford Expidition 2001, rear wiper is not working, water sprays but no action

The washer and wiper are two separate circuits. At the central junction box check 15A fuse 14 which feeds the battery saver relay. At the battery junction box, check fuse 12 which feeds the rear wiper down and up relays. Rear wiper action is controlled by the generic electronic module (GEM). If the rear wiper switch is set to one of the intermittent positions, the battery saver relay closes to apply power to the wiper down and up relays. The GEM selects high/low or park operation. Note that there is an internal thermal breaker in the rear wiper motor so if everything else checks out, the motor may have overheated and opened that fuse. also, the rear wiper relay(s) could be defective

Sep 28, 2012 | 2001 Ford Expedition

2 Answers

I have a hard top for a 1990 jeep wrangler and it has a rear defroster and wiper. This might be a dumb question but should there not be controls for these and if so where at. I have a chiltons book for it...

So the Jeep has a hard top....... or you bought a hard top to put on your Jeep that originally did not come with a hard top. You can forget Chiltons for good info. If there is no switch, the wire harness may/should be there, so you need to install a switch and relay. The harness ends up at the left tail lamp area. The relay is up above the parking brake pedal. 5 wires. Brown. Brown/White, Black/Yellow, White/Black, and Black (ground) The harness should be there to connect a rear wiper switch in the dash.

Dec 10, 2010 | 1990 Jeep Wrangler

2 Answers

Its a 2005 Chevy Aveo and for some reason the front and rear windshield wipers dont work.

Check the fuse first it's in the underhood fuse relay panel and there names are marked on the inside of the lid (wiper) Some units have a relay too and it can fail.

Jun 25, 2010 | 2004 Chevrolet Aveo

2 Answers

The rear wiper on my '99 model exped isnt working ,ford global says its the motor and it will cost me P13k . any one who can help me find a mechanic do some repair on this?

what is P13K?

check the fuse first. dealer can hook up NGS Tester and get fault codes to see what is wrong.

Principles of Operation
NOTE: The generic electronic module (GEM) will not activate the rear wiper system if either the liftgate or the liftgate glass is ajar. If either the liftgate or the liftgate glass becomes ajar while the rear wiper is in operation, the GEM will park the rear wiper motor.
There are two distinct modes of wiper operation:
  • Off Mode: In this mode, there is no rear wiper activity, and the wiper motor will be in the PARK position.
  • Interval Mode: This mode is selected when the rear wiper switch is in either the Interval 1 or 2 position. When this mode is selected, the rear wiper motor is driven up onto the glass by activating the rear wiper UP relay. When the wiper motor HIGH/LOW/PARK position input reaches the high position, the UP relay is deactivated and the DOWN relay is activated to reverse the wiper motor direction. When the wiper motor reaches the LOW position, as determined by the HIGH/LOW/PARK position input, the GEM deactivates the DOWN relay and will begin a new wiper cycle 1 to 10 seconds later, depending on the interval position selected.
To engage the rear window washer, rotate the rear window washer selector downward to the WASH position. The rear window wiper will run as long as the WASH position is selected. When the rear window washer selector returns to the OFF, INT 1 or INT 2 position, the washer will stop immediately, but the rear window wiper will continue for two to three sweeps and then return to its previous mode of operation.
The low washer fluid indicator chime warns that the washer fluid level is low. The low washer fluid indicator chime is a single tone with a duration of one second. The chime will sound when the low washer fluid indicator is initially activated.
The low washer fluid indicator warns that the fluid level in the washer reservoir is low. The low washer fluid indicator will illuminate when the washer fluid level is low and the ignition switch is in the RUN position.
The low washer fluid indicator will deactivate when the washer fluid reservoir is filled and the ignition switch has been cycled from RUN to OFF, then to RUN.
Inspection and Verification
  1. The wiper/washer system is a generic electronic module (GEM) controlled system; refer to Section 419-10 .
  1. Verify the customer concern by operating the wiper/washer system.
  1. Visually inspect for obvious signs of mechanical and electrical damage.

Visual Inspection Chart Mechanical Electrical
  • Hoses to windshield washer pump
  • Wiper linkage
  • Fuses 6 (5A), 8 (5A), 15 (5A), and 20 (5A)
  • Wiring harness
  • Loose or corroded connector(s)
  • Relays
  • Motors
  • Multifunction switch
  • Washer fluid level switch

  • The wipers are inoperative — rear
  • Fuses 6 (5A), 8 (5A), 15 (5A), and 20 (5A).
  • Circuitry.
  • GEM.
  • Multifunction switch (wiper/washer switch).
  • Rear wiper up relay.
  • Rear wiper down relay.
  • Rear wiper motor.

May 12, 2009 | 1999 Ford Expedition

1 Answer

Rear wiper will not work

There are no relays in the back door that i know of, however it sounds like the gearbox in the wiper motor has broken. if there is power to the plug and a good earth, then its got to be the motor. just one thing to check.. make sure the wiper arm is tight on the spindle. I have seen them come loose and give the impression the motor isnt working, could also explain clicking noise.

Jan 22, 2009 | 2000 Ford Focus

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