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Rear window wiper
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Thread: Rear window wiper

  1. #1
    Senior Member lammie200's Avatar
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    Rear window wiper

    My first gremlin popped up. The rear wiper won't shut off. I removed the connection at the motor and ordered a delete kit. Just wondering if anyone knows where the relay for the motor is?
    2017 Abarth Grigio Cenre SR | OEM 17s | EC V3 & Sprint Panel Filter | E+D Tune P1 | TMC Autoflash | 4C CPs | MPx Exhaust | RRM Turbo Blanket | PCV Catch Can | 5mm/12mm Spacers | Neu-F Rear Bar | DNA Lower & Side Braces | MPx MC Bracket | 2" Steering Wheel Spacer

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    Interesting. I have a similar gremlin with the rear window wiper, too. It went on full-speed when the car is put in reverse. I had a call into Fiat Care already and the rep I am working with (for the rear window breakage problem) thought it was really weird.

    What is a "delete kit"?

  3. #3
    Senior Member lammie200's Avatar
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    https://shopeurocompulsion.net/colle...per-delete-kit

    Sounds like yours did something similar to mine. The windshield wipers were turned off, but when I shifted to reverse they started and wouldn’t shut off no matter what I did. I believe that the problem is the switch that is in the motor itself, but I was happy to remove the motor, trim out the hole and plug the fluid line.
    2017 Abarth Grigio Cenre SR | OEM 17s | EC V3 & Sprint Panel Filter | E+D Tune P1 | TMC Autoflash | 4C CPs | MPx Exhaust | RRM Turbo Blanket | PCV Catch Can | 5mm/12mm Spacers | Neu-F Rear Bar | DNA Lower & Side Braces | MPx MC Bracket | 2" Steering Wheel Spacer

    2013 Sport Argento SR - SOLD - | Many Mods

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    Amministratore Fiat500USA's Avatar
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    Sorry to hear. Here's the relay panel. Don't see a wiper relay. I don't have the manual handy at the moment, but will take a look when I can.

    Quote Originally Posted by Fiat500USA View Post
    The starter relay on a Fiat 500 is the T20 Relay.





    Relay Alternate Description Amperage
    T02 R0881 Headlamp 20A
    T03 R0826 Horn 20A
    T05 R0819 A/C Clutch 20A
    T06 R0813 Radiator Fan - Low 30A
    T07 R0812 Radiator Fan - High 40A
    T08 R0876 HVAC - Blower 40A
    T09 R907 Engine Control System (Main Relay) 30A
    T10 R0030 Cigar Lighter / Spare 20A
    T14 R0827 Fog Lamp 20A
    T17 R0823 Fuel Pump 15A
    T19 R906 Cold Start 30A
    T19 RL501 Rear - Fog Lamp 30A
    T20 R0879 Starter 30A
    T30 R0833A After Run Pump 20A
    T30 R0834A MTA Pump 30A
    T31 R0028 Rear Window Defogger 30A

    MAXI FUSES

    Fuse Alternate Description Amperage
    F01 F0001 Body Controller 60A
    F02 F0002 Audio Amplifier 20A
    F03 F0003 Ignition Switch 20A
    F04 F0004 Anti-Lock Brake Pump 40A
    F05 F0005 Electric Power Steering 70A
    F06 F0006 Radiator Fan - Single Speed 20A
    F06 F0006 Radiator Fan - Low Speed 30A
    F07 F0007 Radiator Fan - High Speed 40A
    F08 F0008 Blower Motor 40A

    MINI FUSES

    F09 F0009 Powertrain 10A
    F10 F0010 Horn 10A
    F11 F0011 Powertrain 15A
    F11 F0011 Powertrain (Multiair – If Equipped) 10A
    F14 F0014 High Beam (Shutter) 5A
    F15 F0015 Cigar Lighter 15A
    F16 F0016 Transmission 7.5A
    F17 F0017 Powertrain 25A
    F17 F0017 Powertrain (Multiair – If Equipped) 15A
    F18 F0018 Powertrain 15A
    F18 F0018 Powertrain (Multiair – If Equipped) 5A
    F19 F0019 Air Conditioning 7.5A
    F20 F0020 Heated Seats – If Equipped 15A
    F21 F0021 Fuel Pump 15A
    F22 F0022 Powertrain 20A
    F23 F0023 Anti-Lock Brake Valves 20A
    F24 F0024 Stability Control System 7.5A
    F30 F0030 Fog Lamps 15A
    F82 F0082 Sunroof/Convertible Top 30A
    F83 F0083 Cooling Pump – If Equipped 20A
    F84 F0084 Transmission 10A
    F85 F0085 Rear Defroster 15A
    F87 F0087 Rear Defroster 5A

    Fiat 500 Starter Circuit Wiring Diagram

    Attachment 32972
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  5. #5
    Moderator map's Avatar
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    First, this isn't a 2012 model, is it?

    The BCM has a chip that controls the wipers, but that chip will usually snuff if it fails (no wipers, front or rear). I wonder if one of the BCM relays near that chip is used to boost the signal? https://www.ryangralinski.com/fiat-5...cal-nightmare/

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    Amministratore Fiat500USA's Avatar
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    Fiat 500 and 500 Abarth Wiper System

    Some info on the Fiat 500 and 500 Abarth Wiper System, courtesy of the repair manual:

    Front and Rear Wiper Control - The BCM monitors inputs from the front and rear wiper switch to
    provide control of the either the front or rear wiper motors. The BCM also controls the intermittent wiper
    feature of the front wiper system.

    The right multi-function switch provides hard wired analog and resistor multiplexed inputs to the Body Control
    Module (BCM) for all of the wiper and washer system functions. The BCM then provides the appropriate hard
    wired control outputs to energize or de-energize the wiper and washer relays soldered onto its printed circuit
    board. The relays control the flow of battery current to the wiper motors and washer pump motor, invoking
    the requested wiper and washer system operating modes. Front and rear wiper and washer system operation is
    completely controlled by the BCM logic circuits, and that logic will only allow these systems to operate when
    the status of the ignition switch is Accessory or On.


    The hard wired circuits and components of the wiper and washer system may be diagnosed using
    conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However,
    conventional diagnostic methods will not prove conclusive in the diagnosis of the wiper and washer
    system or the electronic controls and communication between other modules and devices that provide some
    features of the front wiper and washer system. The most reliable, efficient and accurate means to diagnose the
    front wiper and washer system or the electronic controls and communication related to front wiper and washer
    system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.



    Source: FCA
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  8. #7
    Senior Member lammie200's Avatar
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    Someone posted the below on another board. I believe that it is from a manual. It makes me think that the most probably cause is the switch in the motor that doesn’t recognize the parked position of the wiper arm. It never senses that the arm reaches the stopped position so it just keeps going since it is getting power from the ignition switch. I doubt that it is a melted chip on the BCM. If it was I would bet that this wouldn’t be the only problem present. My 2 cents.


    The rear wiper motor park switch is a single pole, single throw, momentary switch within the wiper motor that
    is mechanically actuated by the wiper motor transmission components. The park switch alternately closes and
    opens a voltage signal for the rear wiper motor electronic control logic circuitry of the BCM. The park switch is
    normally an open circuit when the rear wiper blade is in the parked position, and is connected to fused ignition
    output when the rear wiper blade is anywhere except parked.
    Last edited by lammie200; 01-29-2020 at 03:41 AM.
    2017 Abarth Grigio Cenre SR | OEM 17s | EC V3 & Sprint Panel Filter | E+D Tune P1 | TMC Autoflash | 4C CPs | MPx Exhaust | RRM Turbo Blanket | PCV Catch Can | 5mm/12mm Spacers | Neu-F Rear Bar | DNA Lower & Side Braces | MPx MC Bracket | 2" Steering Wheel Spacer

    2013 Sport Argento SR - SOLD - | Many Mods

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