I have a 2001 dodge ram 1500 and every time I shift into reverse it backfires there any solutions

SOURCE: 2001 dodge ram 1500 v8 spark plug wire diagram

the firing order is 1 8 4 3 6 5 7 2 clockwise around the cap

SOURCE: 1999 Dodge Ram 1500 2WD won't shift properly

Sounds like the speed sensor on the rear axle.

SOURCE: Clicking noise in front end 2001 dodge ram 4x4

I have a 2002 Dodge 1500 Ram 4x4, quad cab and had the same problem. In 2wd the clicking was constant, in 4wd it would go away. Also I had no 4wd while in 4wd, found that out after a snow storm. I took my truck to a buddies garage (a Dodge mechanic), he said this is a common problem. He pulled the drivers side wheel, hub, axle and stub axle. The stub axle splines where it goes into the CV joint and and the internal splines in the CV joint were gone. Almost smooth even. The wheel bearing was completely wore out too. I ended up replacing the hub assembly, both the inner and outer axles. Not a cheap fix either I have about $600 repair bill, but it's back on the road now smooth and quite.

SOURCE: thermostat in 2001 dodge ram 1500

the thermostat is located where the upper radator hose comes off the engine there are two bolts or nuts remove hose and remove housing you will see the thermostat when you do clean old gasket material off block and reverse removal procedure

SOURCE: Where is the reverse light switch on a 1999 Dodge Ram 1500 with automatic transmission located?

Look on the gearshift lever. You will have remove the cover to get to it.