97 dodge ram no spark

well make sure timing chain isnt broke

unplug coil 12 volt leads and check to see if 12v is present with key on or that may have to be cranked to check if no 12v then try switching the asd relay with the horn relay to see if relay is bad

check ALL fuses because some fuses feed other fuses and are not labeled as such on the fuse box.

the computer controls the spark based on cam and crank sensors without either of those signals no spark can happen.

it adjusts spark based on all the other sensors input but if they are bad spark will still occur

how the coil fires is 12v+ is supplied by the ignition switch through the asd relay and a fuse.the 12v- side is turned on and off by the computer based on cam and crank signals. when the 12v- is switched off a spark occurs.the ignition switches on those trucks like to get hot and burn terminals.remove the plastic shroud from the colomn, its easy just 3 or 4 srews from under column.unplug switch and look at switch terminals and plug terminals if any haet damge replace switch and remove the individual terms. from plug and splice in new ones.the dealer should have the pigtails because there was a recall on them for burning from high park light loads.check to see if yours was covered and done on the recall.i have seen the switches burn even after the recall so just because it was done dont mean nothing check it anyway well make sure timing chain isnt broke
unplug coil 12 volt leads and check to see if 12v is present with key on or that may have to be cranked to check if no 12v then try switching the asd relay with the horn relay to see if relay is bad
check ALL fuses because some fuses feed other fuses and are not labeled as such on the fuse box.
the computer controls the spark based on cam and crank sensors without either of those signals no spark can happen.
it adjusts spark based on all the other sensors input but if they are bad spark will still occur
how the coil fires is 12v+ is supplied by the ignition switch through the asd relay and a fuse.the 12v- side is turned on and off by the computer based on cam and crank signals. when the 12v- is switched off a spark occurs.the ignition switches on those trucks like to get hot and burn terminals.remove the plastic shroud from the colomn, its easy just 3 or 4 srews from under column.unplug switch and look at switch terminals and plug terminals if any haet damge replace switch and remove the individual terms. from plug and splice in new ones.the dealer should have the pigtails because there was a recall on them for burning from high park light loads.check to see if yours was covered and done on the recall.i have seen the switches burn even after the recall so just because it was done dont mean nothing check it anyway