Low voltage rear fuse box ???? how low , how are you measuring ??? Volt meter ? Cable that supply's B+ voltage has high resistance . I/P BATT fuse #48 125 amp fuse supply's B+ voltage to the rear fuse box.
Circuit Description (BCM Controlled)
Moving the ignition to the START position signals the body control module (BCM) that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the powertrain control module (PCM) requesting engine start. The BCM also energizes the RUN/CRANK RELAY. When the RUN/CRANK RELAY switch side closes, and the vehicle is in Park or Neutral or with the clutch is fully depressed, if equipped, supplies voltage to the starter relay coil. The PCM verifies the transmission is in Park or Neutral and the clutch is fully depressed, if equipped. The PCM will then ground the control circuit of the starter relay, closing the switch supplying voltage to the starter solenoid. On some vehicles the starter will continue to crank the engine with the key released until it starts of the crank command has timed out to prevent excessive heat build up in the starter circuitry or the PCM receives an engine run flag.
Circuit Description (ECM/PCM Controlled)
Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
The power window system consists of the following components:
• Driver door module (DDM)
• Passenger door module (PDM)
• Body control module (BCM)
• LR power window switch
• RR power window switch
• Window up and window down relays in each of the rear passenger window switches
• Window lockout switch
• Reversible power window motors in each of the doors (circuit breaker protected)
• LT DOOR CB 25A (System power for left rear window)
• RT DOOR CB 25A (System power for right rear window)
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SOURCE: Radio cuts out when rear window defogger is turned on(05' Altima)
I have the same problem in my 2003 Altima. I had a friend who works on cars check it out. I watched him and when he removed the panel under the steering wheel next to the driver's door you could hear a clicking noise. He said is sounds like my defogger relay/switch is bad. I located the part and it is not that expensive. I am going to purchase the part and have it put on. I will keep you posted to let you know if it solves my problem. If it does I will give you the name of the part so you can hopefully solve your issue.
SOURCE: Cannot find fuse box diagram for a 2003 Chevy
Go to www.trailvoy.com, look for resources, then OEM manuals, click on owners manual for your vehicle.
SOURCE: how to check my fuse on my 05 trailblazer for the
Hi , Quicker than checking the fuse, ,,,, Check the 12volt supply to the window! One side of the window elements will be connected to EARTH (vehicle body "-") and the other will be a 12v (+) supply. The fuse will be dependant on the ignition and various power supplies. The engine should be running while testing the (+) supply. It will most unlikely be the window itself,Good Luck
SOURCE: which fuse box holds the rear window defroster
there will be a fuse box by foot pedals, or if its left hand drive it will be on passengers side. if not then check the engine bay
SOURCE: 02 chevy trailblazer 4.2l car wont start installed
check your ignition start switch not the key itself the little black plug in box in the steering column 40$ and about an 1 1/2hours of careful work and it will start everytime after that.good luck hope it works
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