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Wipers only work on high I changed the wiper switch but still does not work. Help

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Hi i have had this problem before and it was the wiper relay very cheap and eas to fix always worth a try .

Posted on Sep 06, 2010

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How do I find out if the wipers on my 2006 H3 Hummeris on a relay?


The Wiper/Washer System consists of the following components:
• Windshield wiper/washer switch
• Body control module (BCM)
• Wiper micro relay
• Wiper 2 relay
• Wiper diode
• Windshield wiper motor
• Windshield washer pump
• Windshield washer nozzles
• Windshield washer solvent container
• Windshield wiper arm and blade assemblies
• Windshield wiper transmission
• WIP/WASH 10A fuse
• WIPER 25A fuse

Wiper/Washer System Description
The body control module (BCM) controls wiper motor low speed operation. The washer pump and high speed operation are controlled directly by the wiper/washer switch. The windshield wiper/washer switch supplies voltage on the signal circuits to the BCM for windshield wiper/washer operation. When WASH, MIST, DELAY, LOW, or HIGH is detected, the BCM energizes the wiper micro relay by suppling voltage to the relay coil. This allows battery voltage from the WIPER fuse to flow through the relay switched input then through the contacts and out the relay switched output to the wiper 2 relay switch contacts. Since the wiper 2 relay switch contacts are normally closed to the low speed circuit of the windshield wiper motor, the motor will operate at low speed.

Low Speed Operation
When the wiper switch is in the Low position, voltage is supplied through an internal resistor to the signal circuit. The body control module (BCM) monitors the windshield wiper switch signal 1 circuit, and energizes the wiper micro relay which will operate the windshield wiper motor. The wiper motor will operate at low speed, since the wiper 2 relay is de-energized. Low speed can also be commanded with a scan tool, by commanding Wiper Relay Cmd. ON and OFF. Refer to Scan Tool Output Controls .
High Speed Operation
In the High position, the windshield wiper/washer switch supplies voltage to both the wiper micro relay and wiper 2 relay coils. This energizes both relays and allows battery voltage from the wiper micro relay switched output to the switched input of the wiper 2 relay through its contacts and out the switched output of the wiper 2 relay to the high speed circuit of the windshield wiper motor. The windshield wiper motor will operate at high speed. During high speed wiper motor operation the wiper switch signal circuit is at the low speed signal voltage, and the body control module (BCM) supplies redundant voltage to the wiper relay via the wiper diode.

This info is out of hummer factory service manual !

Dec 10, 2016 | 2006 Hummer H3

1 Answer

My front windshield wipers will only work on high. Any suggestions?


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    CarGurusMay 19, 2015 - Windshield wipers - My wipers stopped last week and the next day they ... slow or intermitt and only work on high speed and the washer wiper doesn;twork ... The LCM does not effect the operation of the motor or switch it just ...

    Windshield Wipers only working at highest setting - Ford Flex Forum

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    Feb 16, 2011 - Windshield Wipers only working at highest setting ... rear wiper worksjust fine, just the front wipers only work at highest setting. ... the wipers sometimes grinds out the gears thus only working at high sppeds. If it is the motor or Transmission for the wipers, can I fix this myself and how much would it cost me.

    Common GM Wiper Problem - YouTube

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    Oct 25, 2010 - Uploaded by roadragecustoms
    The windshield wipers only worked occasionally. ... My 1998 dodge ram wipers only work on high will this help me? thanks.... Express van. you have to take out the motor and the transmission from under the front of the van..

Feb 09, 2016 | Cars & Trucks

1 Answer

I'm driving in rain, wipers working good, all of a sudden they quit! I drive for 15 min, check again, they work for a while, then quit again...what in the problem?


If your not familiar with automotive electronics an module control of components , I suggest you take it to the dealer . They have the tools to diagnose this type problem !
The Wiper/Washer System consists of the following components:
?€¢
Windshield wiper/washer switch


?€¢
Body control module (BCM)


?€¢
Wiper PCB relay


?€¢
Wiper high PCB relay


?€¢
Windshield wiper motor


?€¢
Windshield washer fluid pump


?€¢
Windshield washer fluid level switch


?€¢
WPR fuse 25 A


?€¢
WSW fuse 10 A


Low Speed Operation
When the wiper switch is in the low speed position, ground is applied through the switch internal resistor and the wiper switch low signal circuit to the body control module (BCM). In response to this signal, the BCM energizes the WIPER PCB relay by applying battery voltage through the wiper relay control circuit to the coil side of the relay. This allows battery positive voltage from the WPR fuse to flow through the switch input side of the WIPER PCB relay and out to the switch input side of the WIPER HIGH PCB relay. Since the wiper high relay is de-energized and its switch contacts are normally closed to the low speed control circuit of the windshield wiper motor, the motor will operate at low speed.
High Speed Operation When the wiper switch is in the high speed position, ground is applied through the windshield wiper switch high signal circuit to the body control module (BCM) indicating the wiper high speed request. In response to this signal, the BCM then energizes the wiper PCB relay, as stated above, and the wiper high PCB relay by applying ground through the control circuit to the coil side of the relay. With the wiper high relay energized and its switch contacts closed to the high speed control circuit of the wiper motor, the motor will operate at high speed.
Wiper motor high speed operation and the wiper high speed PCB relay can also be commanded ON/OFF by using a scan tool. Refer to Control Module References.
DTC B3715 02: Front Wiper Relay Drive Circuit Short to Ground
DTC B3875 00: Wiper High Speed Relay Circuit
DTC B3922 00: Front Wiper Function Select Circuit
You could Have a switch problem , BCM problem ,PCB relay problem , the pcb relays are non serviceable an the whole under hood fuse box would need to be replaced . Malfunctioning motor bad ground some where etc.....

Dec 20, 2015 | 2008 Chevrolet Impala

1 Answer

2006 vw jetta wiper still not working after changing the wiper motor and wiper switch ? help


Did you check the fuse? Have power at the plug? could be a bad ground.

Dec 06, 2015 | Evan Cars & Trucks

2 Answers

Why my windshield wiper only works on high and don't work on delay?


There is a wiper delay module under the dash that has failed. Windshield Wiper Switch MOTORCRAFT SW-5665

Sep 17, 2014 | Cars & Trucks

1 Answer

Wipers on 2005 wont run but on high, i replaced wiper switch it too did the same thing? what would cause this


Stay away from the highway chain shops

You already saw the guessing at nothing, telling you
about your indicator switch & non sense about a short

Try a local repair shop, that has been there for 30 years

Ask around & only go to the best shops out there

Aug 21, 2014 | 2005 Pontiac Grand Prix

2 Answers

2003 Silverado, changed wiper control module, NOW.. Wipers only come on when turned to HIGH, work only on high/low, will not shut off until key is turned off & back on, then wipers park and turn off. ...


Sounds like what's called a park switch. If you can get one it is not that hard to change. It is inside the wiper motor you may want to change the whole motor if you can find one in a salvage yard.

Jun 25, 2014 | Cars & Trucks

1 Answer

Wipers only work on high


You might want to check the wiper fuse.

Nov 21, 2013 | 2006 Chrysler PT Cruiser

1 Answer

96 dodge ram 2500 wiper delay does not work. have replaced motor, switch and governor still does not work. wipers will work on slow and high.


If your wiper work on slow and high and delay does not work its wiper delay module need to be replace. Get one from a junk yard save you some cash, common on dodge vech. 04883827AA for windshield wiper motor delay module. hope that help some

Jul 31, 2009 | 1999 Dodge Ram 2500 4WD

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