Hello Faye Sims,
Whatever you are looking for... it is
big & common
to a lot of circuits... My best advise when starting
to trouble-shoot
MULTIPLE ISSUES is a start
at the MAIN
BATTERY & GROUND connections.
(unless your CHEROKEE has recently been
flooded).
Start at your battery posts and move
METHODICALLY
through your main body (
ground) & Starter cables
(
battery) and make sure the connections are clean
and tight.
Look for corrosion, breaks or discoloration of insulation or any signs of heat... Unless you are in a terrible rush... Shop for best prices from reputable sources (Like: Rockauto, Napa,
even eBay & AMAZON (etc.))... also such products as
CONTACT CLEANER, NALOX/NoCo & battery washers
(in my opinion... are a
MUST on AUTO-BATTERY posts).
See here:
Amazon com Battery Anti Corrosion Washers 2 Red 2 Black Automotive
Quality High IMPEDANCE (or No Contact) VOLTAGE
TESTERS... will protect existing circuits while attempting to find faults... (without FEAR of triggering
EXPLODING AIR BAGS
(in my opinion))... Or destroying semiconductors w/ spark...
Klein Tools NCVT 2 Dual Range Non Contact Voltage Tester Amazon com
Amazon battery cable
Amazon com Deka 00297 Positive Battery Cable Automotive
Rockauto battery cable (less $, 3 years, 36000 miles)
http://www.rockauto.com/en/catalog/jeep,2000,grand+cherokee,4.7l+v8,1381418,electrical,battery+cable,2500
Finally... Check out buying A FUSE at your local parts store
(abusive & egregious $$$$ (
know your FUSE TYPES))
Amazon com Bussmann NO 44 ATC Blade Fuse Tester Puller Kit Automotive
Comment me back... Spent a lifetime doing this...
(love it)
Free Drawings at BBB Industries
(registration is required... these are real drawings)
Hope this helps