Question about 2007 Jeep Grand Cherokee

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2007 grand Cherokee parking sensors stopped working! After start up get a beep and 2 lights flash! The park asst fail light is on, on the dash! Everything else seems to be ok! Any ideas please??

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The magic is busted.
all you can do is what, check fuses
or get it serviced
or read the operators guide, on its usage and options, did you?
if you are tech savvy, or can read well
the SM cover this
and is free to read, 24/7 at no cost to you
and is real book.
why not read that first.
posted here over 300 times now.
click WK jeep your car is WK. (the secret jeep code for USA jeeps only)
we are USA site with USA cars.

start reading on 8B page 72, park assist.
its all there, to read, at all times.
and is official book not hacks/clones, or abridgements. the real deal. there.
btw, searching the PDF works too, its OCR ready
and chapter 8w shows all wiring to it. every inch

Posted on Dec 10, 2016


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I have parking sensors on my 2006 jeep grand cherokee front and back. they do not work any more. the computer is telling me to service them. how? I do have two red lights on the displays and i can't...

When you put your jeep into reverse you will see the red lights. These will still work even when is says service parking assist system needs service. The problem is in your transmission control unit. This is a common problem in the Grand Cherokees. You will have two options here. You can take it to your Jeep dealership and ask them to flash the TCU. This may or may not work. The other option is they will have to replace the TCU. They run about $600.00. Hopefully if they flash the TCU it will work again. Good luck

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I'm pulling a trailer and "Park Asst Blocked" light came on the dash. Is it ok to drive with that light on?

{: ) When the park assist system detects a hitched object behind your vehicle, it will normally display that "Park assist Blocked" message. You can still drive safely even with that message. When you're done, just remove the hook off. Turn off engine for a few minutes. turn it on again and drive your truck around for 30kmh or so, then test again the park assist system.

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My 2007 silverado was fine when i parked it last it wont start..plenty of battery and lights..but no ignition..and the steering wheel is not locked when in will not start in park, or...

The steering wheel will not "lock" until you turn it about 45 degrees from center...this is normal. If your security light is flashing, there is a problem with your security system that is keeping you from starting the engine. Try this: Set the parking brake. Turn the ignition to the "RUN" position and wait about 10 minutes for the security light to stop flashing. When the light stops flashing, crank the engine without turning the key to the off position. If it starts, take the vehicle to get the security system checked. If it doesn't start, tow it. You probably need a new PassKey sensor.

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My parents have a 1993 Jeep Grand Cherokee and the Dash lights and parking lights go on and off. What could cause this problem

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2007 Jeep Grand Cherokee tail light problem. When the lights are turned on the rear right tail light and blinkers do not work. When the lights are turned off they work like normal. A ground issue maybe?...

hello Anon.
battery charged, fuses good, F10 is RR. park
trailer wring hacks? (inspections find that) and collision damage there RR.
does RF work with RR fails>? both ends of car have park and blink.
I avoid Tail word for that one fact.
if you scan the PCM with a scan tool, are there DTC errors.
not scanning makes work 10x harder.!

"rear right tail light and blinkers do not work." both are dead? "and"
then turn off parks and blinks start working?
maybe the parks and blink wires shorted to gether.
what does not work mean, dead, or stuck on?
all key facts in diagnosis. all that.
i have 2007 GC FSm.

there are 4 elements (lamps actual there)
park is seperate from blink , totally.

the MIP module under hood drives turns off sperate drivers.
LF, RF ,LR, RR. so RR is bad. and not related to front like old cars.
park feed
all park lines go to a single point, the park relay 7 output.
so if something shorts to park all parks mess up.
each line has a fuse. so each can die by self.
There is only 1 park relay #7

so my question is, do any other park lamps mess up.
you said the blinks and parks (tail) do not work.
so? what about all park lamps. side and front.

if only RR fails, no other symptoms, i concur, bad ground. there.

a volt meter can measure bad grounds
with wire to battery neg,
and red meter at ground on lamp base.
if not 0v, or less than (0.5v) a 1/2 volt, its bad.

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I would look at replacing the headlight switch(junkyard will save you money)!

Hope this sheds some light on it!

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