Sometimes when you start it, nothing on the dash works

It is in the engine bay next to the radiator cap. There are very few reasons where you ever need to go near it.

Where is the ECM located on a 2001 Jeep Cherokee Sport

Jeep Cherokee Forum https://www.cherokeeforum.com > where-ecm-located...

Feb 4, 2018 · 16 posts · 3 authors
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here - Where is the ECM located on a 2001 Jeep Cherokee Sport ?
where is my pcm located? HELP! please
Aug 19, 2014
Where is the ECM located ? - Jeep Cherokee Forum
Oct 1, 2015
???replacing an XJ computer??? - Jeep Cherokee Forum
Apr 12, 2017
Replacing the PCM - Jeep Cherokee Forum
Dec 6, 2009
More results from www.cherokeeforum.com

More here

https://www.google.com/search?q=2001+jeep+cherokee+sport+ecm+location

..

light switch is bad,they have a history of it,and also blinker switch

More than likely needs a crank sensor, Try cranking with the crank sensor disconnected, you should not get the dashes in the cluster. The crank sensors take out the communication system of the vehicle

sounds like the flasher up under the dash

You are looking more so for relays, not fuses, check the hand book again under relays.

On column or under dash? Well, it pretty much dosen't matter...If you see screws underneath, remove them if not it likely snaps off and on.

Horn relay switch or faulty horn.

Try this first. With one of you under the car whack the starter with a hammer as the other of you turns the key t the start position and holds it there. No wimpy whacks here give it one or two good ones. If it is a bad starter it may start this way. If it does, a new starter motor is in your future. Very easy to change on a Jeep. If it doesn't work let me know and we will go further.

The heat control valve, this is the valve that allows hot engine coolant to flow into the heater core inside the dash , if its decective it will not open to let the coolant to flow.
The Thermostat if it is bad (stuck open) the car will not warm up and will also cause a no heat problem as well as many other issues.
Does the car warm up quickly and reach operating temp within about 5 min?

i had the same problem with my 2001 Cherokee Sport i replaced the battery and now it runs fine.