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Need electrical diagram for merc w202 rear wiper

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Posted on Jan 02, 2017

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SOURCE: need belt diagram for a 2002 4.6 merc engine

There should be a sticker with the diagram on the plastic shield covering the belt drive or on underside of hood.

Posted on Nov 10, 2009


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First you must pull off the trim panel and expose the mortar and wiring to the motor, then test for power and ground, if present test the motor.

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You have to disconnect the rear brake pipes. Disconnect the propshaft. Disconnect the rear shock absorbers if they are connected to the axle.
You didn't say what model of merc you have. There's unlikely to be just one diagram that explains how to remove it.

Try looking on Youtube. Here's a video of a Merc rear axle removal:

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Check its wiring, there must be some sort short circuits. There is no other reason other than this.

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I have a 1999 explorer sport that the rear wiper does not work. I have already replaced the wiper assembly,checked the fuse under the hood, switched the wiper relay with another known to be good and tested...

Before replacing GEM modules test the electrical circuits ,don't guess . And if you don't know how to test your best bet take it to a qualified repair shop . These modules are capable of setting DTC'S diagnostic trouble codes , need an advanced type scan tool . Not a code reader . How did your test the switch ? Low voltage input to the gem . Plus there are two relays for the rear wipers . Did you pull the relays an test (with a voltmeter ) for B+ voltage on the control side and load side of the relay ? Is the GEM energizing the relay .
You people crack me up ,you have no clue .

switched the wiper relay with another known to be good and tested the wiper switch all are good,
Electric Testing Techniques You Need to Know

looking at wiring diagrams to see what all is involved in making the wipers work ,testing electrical circuits ,this is how you find electrical problems , not swap relays an just replace parts .
Here is a web site for free wiring diagrams. Enter the vehicle info. year make , model and engine size . Under system click body & accessories . Under subsystem click Wiper/Washer . Click the search button ,then the second blue link. Thats for the rear wipers . Do you know how a relay works ? Watch this video

VEHICLE RELAYS Operation Diagnosis . Do not assume the gem module is bad with out checking codes an testing the electrical circuit.

Aug 03, 2017 | 1999 Ford Explorer

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I have a C180 (2000reg) W202 I think, the wiper will not return to the proper position - now parks half way up the passenger side, any ideas

Not sure about mercs, but on most other cars it means that the wipor motor needs replacing or te contacts cleaned inside it.

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Heater fan is not working at all

probably the brushes that need replaced. Very common on W202 Mercs.

Check out ebay item number 200461572315 for replacement brushes

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