Lost Power steering

[mmayer813]

So, I have been flat towing my 2021 Rubicon around the country for the past month. Somehow, a few days ago, I drained the battery, so I jumped it and it started up no problem. The problem however, is that I lost all power steering, the radio, and all the charging ports. I am in my way home in a few days, so I should be able to get it into the shop in a week or two (all shops are jammed up), but is there anything I can try to fix it? I have checked several of the fuses I thought might be a problem, and they were all good. I tried disconnecting the battery (overnight), and still had the issue after reconnecting. Its drivable, but obviously difficult steering, so I can still get around, but until I can get it to the ship, I would appreciate any advice. Thanks in advance!

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[21 Willys]

So, I have been flat towing my 2021 Rubicon around the country for the past month. Somehow, a few days ago, I drained the battery, so I jumped it and it started up no problem. The problem however, is that I lost all power steering, the radio, and all the charging ports. I am in my way home in a few days, so I should be able to get it into the shop in a week or two (all shops are jammed up), but is there anything I can try to fix it? I have checked several of the fuses I thought might be a problem, and they were all good. I tried disconnecting the battery (overnight), and still had the issue after reconnecting. Its drivable, but obviously difficult steering, so I can still get around, but until I can get it to the ship, I would appreciate any advice. Thanks in advance!

Have you checked fuses? That would be the first place for me.

 

[mwilk012]

Are you testing with a voltmeter or a test light?
E-torque or no?
How many warning lights and messages come up on the dash at startup, and which ones?

 

[mmayer813]

I currently do not have voltmeter or anything similar to test with. There are no warning messages that come up on the dash, and none of the dealers in Sioux Falls have time to help for the next 2 weeks. They will not even take the time to just run a scan (apparently it takes hours...or so they say). I will be making an appointment with my dealer at home, but I was really hoping there was something simple I could do during my travel.

 

[mwilk012]

Buy a multimeter. When you jump started it, where exactly did you place the leads? Also, if you need help, need to know whether you have Etorque or not and if you are receiving warning lights

 

[mmayer813]

I have a multimeter at home, but that's still 1000 miles away. The Jeep is only being towed at this point since we are now making our way home. I'll recheck the fuses to make sure I didn't overlook something, otherwise I'll just have to wait until I get home.

 

[mwilk012]

You can’t check the main fuses visually, and they’re the most likely culprit when problems pop up right after a jump start.

 

[roaniecowpony]

You really ought to use a code reader first.

 

[roaniecowpony]

Here's the power steering schematic

 

[roaniecowpony]

Power outlets.

 

[roaniecowpony]

A link to the wiring diagrams
(1) Jeep JL Wrangler Wiring Diagrams | Jeep Wrangler Forums (JL / JLU) - Rubicon, Sahara, Sport, 4xe, 392 - JLwranglerforums.com

 

[roaniecowpony]

Power Distribution Center (PDC)

compartment near the battery. This center contains cartridge fuses, mini fuses, and relays. The PDC top cover is labelled with each serviceable fuse/relay location, function, and size.

Power Distribution Center (PDC)

Cavity .. Cartridge Fuse... Micro Fuse .. Description



F01 – – Spare
F02 40 Amp Green – Starter
F03 – 5 Amp Tan Intelligent Battery Sensor (IBS)
F04 – 20 Amp Yellow Fuel Pump MTR/FPCM
F05 – 5 Amp Tan Security Gateway
F06 – – Spare
F07 – 15 Amp Blue Low Temp Radiator Cooling Pump (LTR) — If Equipped
F08 – 15 Amp Blue Trans Control Module TCM-8HP CYGNUS
F09 – – Spare
F10 – 15 Amp Blue Key Ignition Node (KIN)/Radio Frequency Hub(RF HUB)/Electric Steering Column Lock (ESCL)
F11 – 10 Amp Red UCI Port (USB & AUX)
F12 – 25 Amp Clear HIFI Amplifier
F13 – – Spare
F14 – – Spare
F15 – 15 Amp Blue Instrument Panel Cluster (IPC)/Switch Bank- Heavy Duty Electrical Pkg (SWITCH BANK-HD ELEC)
F16 – – Spare
F17 – – Spare
F18 – 10 Amp Red Air Conditioning Clutch (AC CLUTCH)
F19 – – Spare
F20 30 Amp Pink – Central Body Controller (CBC) 1-INTERIOR LIGHTS
F21 – 20 Amp Yellow REAR WIPER
F22 – 10 Amp Red Engine Control Module (ECM)/Powertrain Control Module (PCM)/Motor Generator Unit (MGU) WAKE UP/Power Pack Unit (PPU) WAKE UP
F23 – 10 Amp Red Powertrain Control Module (PCM)/Engine Control Module (ECM)
F24 – – Spare
F25 – 10 Amp Red Module Shift By Wire (MOD_SBW)
F26 40 Amp Green – Central Body Controller (CBC) 2-EXTERIOR LIGHTS #1
F27 30 Amp Pink – Front Wipers
F28 40 Amp Green – Central Body Controller (CBC) 3-POWER LOCKS
F29 40 Amp Green – Central Body Controller (CBC) 4-EXTERIOR LIGHTS #2
F30 – – Spare

Cavity .. Cartridge Fuse .. Micro Fuse .. Description
F31 – 10 Amp Red DIAGNOSTIC PORT
F32 – 10 Amp Red Heating Ventilation Air Conditioning Mod (HVAC CTRL MOD)/Steering Column Lock (SCL)/Occupant Classification Module (OCM)/Driver Presence Detection Module (DPDM)
F33 – 10 Amp Red ParkTronics System (PTS)/Infrared Camera Module (IRCM)/Airbag Disable Lamps (AIRBAG DISABLE LMPS)
F34 – 10 Amp Red Electronic Stability Control (ESC)/Electric Hydraulic Power Steering (EHPS)/Smart Bar Control Module (SBCM) WAKE UP
F35 30 Amp Pink – BRAKE VAC PMP — If Equipped
F36 30 Amp Pink – TRAILER TOW MOD — If Equipped
F37 30 Amp Pink – TRAILER TOW CONN 7W — If Equipped
F38 20 Amp Blue – Engine Control Module ECM
F39 – – Spare
F40 – 15 Amp Blue DriveTrain Control Module (DTCM)/Axle Lock (AXLE LOC) FT_RR
F41 – 15 Amp Blue Instrument Cluster (IC)/Security GateWay (SGW) WAKE UP

Cavity .. Cartridge Fuse .. Micro Fuse .. Description
F42 – 10 Amp Red Power Control Relay Control Feed (Electric Stop/Start)/Spare (Belt Starter Generator) -- If Equipped
F43 20 Amp Yellow PWR OUTLET (CARGO) BATT
F44 – 10 Amp Red InfraRed Camera (IRCAM) HEATERS
F45 – 20 Amp Yellow PWR OUTLET (CARGO) IGN*
F46 – 10 Amp Red AUTO HDLP LVL MOD/LVL MTR/HDLP SW
F47 – – Spare
F48 – – Spare
F49 – 10 Amp Red Occupant Restraint Controller ORC
F50 – 10 Amp Red HD ACC — If Equipped
F51 – 10 Amp Red Digital TV (DSRC)/USB/InSide RearView Mirror (ISRVM)/ Compass Module (CSGM)
F52 – 20 Amp Yellow CIGAR LTR (Cigarette Lighter)
F53 – – Spare
F54 – – Spare
F55 – – Spare
F56 – 10 Amp Red IN-CAR TEMP SENSOR
F57 – 20 Amp Yellow Frt Drvr Htd Seat


Cavity .. Cartridge Fuse .. Micro Fuse .. Description
F58 – 20 Amp Yellow Frt Pass Htd Seat
F59 – – Spare
F60 – 15 Amp Blue Comfort Steering Wheel Module (CSWM) (HTD STR WHEEL)
F61 – 10 Amp Red Left Blind Spot Sensor (LBSS)/Right Blind Spot Sensor (RBSS)
F62 – – Spare
F63 – 10 Amp Red Occupant Restraint Controller (ORC)
F64 – – Spare
F65 – – Spare
F66 40 Amp Green – HVAC BLOWER MTR FRT
F67 – – Spare
F68 – – Spare
F69 – 5 Amp Tan Motor Generator Unit MGU Belt Starter Generator (BSG) — If Equipped
F70 – 25 Amp Clear INJ/IGN COIL (GAS)/GLO PLUG MOD (DSL)
F71 – – Spare
F72 – 10 Amp Red HD ELEC ACC PKG — If Equipped
F73 20 Amp Blue – PWR TOP LT

F74 20 Amp Blue – PWR TOP RT
F75 – 10 Amp Red Power Pack Unit - Battery Pack Control Module & Auxiliary Power Module (PPUBPCM & APM) Belt Starter Generator (BSG) — If Equipped
F76 – 20 Amp Yellow ECM (GAS)/PCM (DSL)
F77 – 10 Amp Red HTD MIRRORS
F78 – 10 Amp Red COMP/INTRUSION/SIREN/INTRUSION SENSORS
F79 – 20 Amp Yellow SMART BAR CTRL MOD
F80 – 15 Amp Blue Powertrain Control Module (PCM)
F81 30 Amp Pink – REAR DEFROSTER (EBL)
F82 30 Amp Pink – FUEL HTR — If Equipped
F83 60 Amp Yellow GLOW PLUG — If Equipped
F84 30 Amp Pink – UREA HTR CTRL UNIT — If Equipped
F85 – 10 Amp Red PM SENSOR — If Equipped
F86 30 Amp Pink – BRAKE VAC PMP 2 — If Equipped
F87 – 10 Amp Red SUPPLY/PURGING PMP — If Equipped
F88 20 Amp Blue – NOx SENSOR #1/ #2 — IF Equipped
F89 – 10 Amp Red Steering Column Control Module (SCCM)/ Cruise Control (CRUISE CTL)/ Digital TV (DTV)
F90 20 Amp Blue – TRAILER TOW PARK LMP — If Equipped
F91 – 20 Amp Yellow HORN
F92 40 Amp Green – HD ACCY #2 — If Equipped
F93 40 Amp Green – HD ACCY #1 — If Equipped
F94 – 10 Amp Red Tire Pressure Monitor (TPM)/ RF Hub system (CORAX)
F95 – – Spare
F96 – 10 Amp Red PWR MIRROR SW
F97 – 20 Amp Yellow RADIO/TBM
F98 – 10 Amp Red SW BANK-HD ELEC/OFF ROAD
F99 – – Spare
F100 30 Amp Pink – ESC-ECU & VALVES
F101 30 Amp Pink – DriveTrain Control Module (DTCM)
F102 – 15 Amp Blue DUAL USB PORT
F103 – 15 Amp Blue HD ACCY #3 — If Equipped
F104 – 15 Amp Blue PPU COOL PUMP — If Equipped
F105 – 10 Amp Red Integrated Center Stack (ICS)/Heat Ventilation Air Conditioning (HVAC)
F106 40 Amp Green – Electronic Speed Control (ESC)-PUMP MTR
F107 – 20 Amp Yellow TRAILER TOW STOP/TURN LT — If Equipped
F108 – 15 Amp Blue HD ACCY #4 — If Equipped
F109 – 20 Amp Yellow TRAILER TOW STOP/TURN RT — If Equipped
F110 30 Amp Pink – POWER INVERTER
F111 20 Amp Blue – TRAILER TOW BACKUP — If Equipped

* Customer can select to switch the Cargo Power Outlet from F43 battery fed power to this position F45 which is fed when the ignition in ON.

 

[mmayer813]

UPDATE: So, it's been in the shop now for 2 days, and they finally got everything fixed. No fuses were bad, but they found the radio was not wired correctly (explains radio issues from the day I bought it), and they just started replacing steering components until it started working again. Of course nobody can explain root cause of failure and if it was related to a jump start, or something mechanical/hydraulic. They claim that during flat towing, there should be "0" draw on the battery, yet something drained it twice during tow (although 1st time I may have left "acc" on, but not the second time). Maybe the radio being mis- wired was tge culprit....we'll never know for sure until next time I tow for 2 days. Anyway, all fixed and happy to have it back.

 

[roaniecowpony]

UPDATE: So, it's been in the shop now for 2 days, and they finally got everything fixed. No fuses were bad, but they found the radio was not wired correctly (explains radio issues from the day I bought it), and they just started replacing steering components until it started working again. Of course nobody can explain root cause of failure and if it was related to a jump start, or something mechanical/hydraulic. They claim that during flat towing, there should be "0" draw on the battery, yet something drained it twice during tow (although 1st time I may have left "acc" on, but not the second time). Maybe the radio being mis- wired was tge culprit....we'll never know for sure until next time I tow for 2 days. Anyway, all fixed and happy to have it back.

I have a Mopar flat tow harness in my JLUR. I also have a RVi brake that plugs into the cigarette lighter socket. I towed it to Idaho a couple years ago. The battery drained from the brake/tail lights and brake system drain. The Mopar harness has no charging for the toad battery. I had to buy a separate system for that. Don't know if that's your issue. Just my experience with what I have.

 

[mmayer813]

I have a Mopar flat tow harness in my JLUR. I also have a RVi brake that plugs into the cigarette lighter socket. I towed it to Idaho a couple years ago. The battery drained from the brake/tail lights and brake system drain. The Mopar harness has no charging for the toad battery. I had to buy a separate system for that. Don't know if that's your issue. Just my experience with what I have.

No, I have a mechanical surge break, so there is no connection to the electrical. The only item directly connected is a 30mA LED that only activates when the surge break pulls the Jeep break, and I have 2 string bungee attached to the break pedal to guarantee full return after breaking.

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