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How long of charge for roadside pro RPSC-904 - Cars & Trucks

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Battery light stays on after starting car


Most likely a charging system issue. Possible alternator failure. Have it checked immediaetly or you may find yourself broken down on the roadside

Oct 18, 2015 | 2005 Chrysler Crossfire

2 Answers

Roadside assistance said my alternator was bad. Autozone said it was fine, battery is new. Does anyone have any suggestions ?


Roadside assistance made a snap decision that the alternator had failed - without testing. However, if the alternator has been replaced and is not a genuine OEM part, you may be running with a Chinese imitation that is prone to overheating. Also, the breakdown on the road may have been due to some as-yet-undiscovered problem.

Sep 11, 2015 | 2001 Ford Windstar

1 Answer

What is causing the battery to drain?


Running the car will drain the battery it if it's not charging ! An if your charging light is on it isn't charging ! Did you check power an grounds on the alternator ? There is a single heavier wire on the back of the alternator, this should have battery voltage ! You may want to take this to a ASE certified repair shop !
Functionality
With the ignition switch in the RUN position, voltage is applied through the warning indicator I circuit 904 (LG/RD) to the voltage regulator. This turns the regulator on, allowing current to flow from battery sense A circuit 35 (OG/LB) to the generator field coil. When the engine is started, the generator begins to generate alternating current (AC) which is internally converted to direct current (DC). This current is then supplied to the vehicle's electrical system through the output (B+) terminal of the generator.
Once the generator begins generating current, a voltage signal is taken from the generator stator and fed back to the regulator S circuit 4 (WH/BK). This voltage feedback signal (typically half the battery voltage) is used to turn off the warning indicator.
With the system functioning normally, the generator output current is determined by the voltage of the A circuit 35 (OG/LB). The A circuit 35 (OG/LB) voltage is compared to a set voltage internal to the regulator, and the regulator controls the generator field current to maintain the correct generator output.
The set voltage will vary with temperature and is typically higher in cold temperatures and lower in warm temperatures. This allows for better battery recharge in the winter and reduces the chance of overcharging in the summer.
Battery Positive Output (B+) Circuit 38 (BK/OG)
The generator output is supplied through the battery positive output (B+) terminal on the back of the generator to the battery and electrical system.
I Circuit 904 (LG/RD)
The I (ignition) circuit 904 (LG/RD) is used to turn on the voltage regulator. This circuit is powered up with the ignition switch in the RUN position. This circuit is also used to turn the charging system warning indicator on if there is a fault in the charging system operation.
A Circuit 35 (OG/LB)
The A (battery sense) circuit 35 (OG/LB) is used to sense battery voltage. This voltage is used by the regulator to determine generator output. This circuit is used to supply current to the generator field (rotor). The amount of current supplied to the rotor will determine generator output.
S Circuit 4 (WH/BK)
The S (stator) circuit 4 (WH/BK) is used to feed back a voltage signal from the generator to the regulator. This voltage is used by the regulator to turn off the charging system warning indicator. The S circuit is fed back externally on external mounted regulator generators.
Visual Inspection Chart Mechanical Electrical
  • Battery case, posts, hold-down clamp, cables and connections
  • Generator drive (serpentine) belt for condition and tension to make sure there is no slip between the belt and the pulley. For additional information, refer to Section 303-05 .
  • Battery charge
  • Generator pulley
  • Battery junction box (BJB)Mega Fuse
  • Battery junction box fuse:
    • 11 (20A)
  • Central junction box (CJB) fuse:
    • 30 (30A)
  • Circuitry
  • Charging system warning indicator
  • Cables
  1. Check the operation of the charging system warning indicator lamp (instrument cluster). Normal operation is as follows:
    • With the ignition switch OFF, the charging system warning indicator should be OFF.
    • With the ignition switch in RUN and the engine off, the charging system warning indicator light should be on.
    • With the engine running, the charging system warning indicator light should be off.
  1. Verify the battery condition. Refer to Section 414-01 .
Normal Charging System Voltages and Charging System Warning Indicator Operation Ignition Switch Position A Circuit 35 (OG/LB) S Circuit 4 (WH/BK) I Circuit 904 (LG/RD) Generator B+ Circuit 38 (BK/OG) Battery Engine to Battery Ground Charging System Warning Indicator Operation OFF 12 volts 0 volts 0 volts 12 volts 12 volts 0 volts Off RUN-engine off 12 volts 0 volts 1-3 volts 12 volts 12 volts 0 volts Illuminated RUN-engine running 13-
15 volts 1/2 battery voltage 13-
15 volts 13-
15 volts 13-
15 volts 0 volts Off
  1. If the customer concern is verified after the initial inspection, refer to the Symptom Chart to determine which tests to carry out.
    • The charging system warning indicator is on with the engine running (the system voltage does not increase)
    • Circuitry.
    • Voltage regulator.
    • Generator.
    • GO to Pinpoint Test B .
    Your whole problem is the alternator is not charging , a couple tests with a volt meter would tell you !

Aug 16, 2015 | 2001 Ford Expedition

1 Answer

Hello i have a 2011 elantra the trip odometer resets,clock goes back to 1:00,lose all preset radio channels,air selector like floor to defrost resets back to head selection, remote locks and trunk dont...


It's a brand new car. Hyundai has a 5 yr/unlimited miles roadside assistance. Call them and have it towed to your dealer (FOR FREE). Hyundai will fix it FOR FREE

Your car isn't supposed to be doing what it's doing - you obviously have a battery or electrical problem that needs to be addressed. No need to try to fix it yourself - that's what the warranty is for.

This is the roadside assistance number from the HYUNDAI website:


1-800-243-7766


Good Luck!

Mar 02, 2011 | Hyundai Elantra Cars & Trucks

2 Answers

I locked my keys in the car and need to know how to get in. I can't afford to call a locksmith.


do you have aaa roadside assistance? they can unlock your car.a towing company can unlock it also. or you can try using a metal coat hanger and going in by prying the door open enough to get the hanger through. some parts stores sell lock out kits that have tools and instructions to unlock cars and trucks. if your car has door air bags,do not attempt this because they can go off.most luxury vehicles only have the side door airbags though.if you have a cell phone some phones come with roadside assistance that could help you.a typical roadside assistance for an unlock service is about $30.00 if you have towing insurance of anykind should be able to assist you. good luck and thank you for choosing fixya.com

Jan 09, 2011 | Pontiac Sunfire Cars & Trucks

1 Answer

I gave a jump to my 1993 400 sel now the abs and asr dash lights will not go out and the speed ometer does not work


Check fuses, you are not supposed to "jump" MB thats why they have forever roadside assistance. You charge battery while disconnected and reconnect to start.

Jan 29, 2010 | 1993 Mercedes-Benz Mercedes Benz 400 Class

2 Answers

Need Radio Code for CLK430 Mercedes Benz


Yes. Every time you disconnect the batterie you need to put radio code again.

Feb 24, 2009 | 2003 Mercedes-Benz CLK-Class

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