Wipers are not working and my battery keeps getting dead unless i take terminal off.car is s.type 1999

When you say everything goes dead are we talking all lights, radio, wipers? If so, main power or ground cables bad or fusible link. If just engine, check coil, ignition module, crank/cam position sensor.

Could be a dead spot in your starter or your solenoid

if you have a dead short you will blowing fuses all the time,
check to see that the battery isnt getting drained with the ignition off, take the negative terminal off the battery if it sparks when you connect it back on with every thing off
you may have some thing in the system sucking all the power like an interior light etc

First have the battery tested,and then clean the battery terminals,and the cable ends until they shine.

Replace the wiper motor often time there is a dead spot on the commutator. If you want to be sure unplug the motor and use a jumper wire with 12 volts to the appropriate terminal to energize the motor, you may need to ground one of the teminals to get it to work, if the motor runs with out interuption then yes it is most likely the wiper switch bad ground or a break in the harness somewhere, check and repair the easiest first ground wire motor jump wire check etc. then the switch.

Welcome to the company of those of us with a case of the "Lost ground."

Wiper circuits are notorious for being coonected to a ganged / terminal junction ground that in 10 years starts to act weird.

Get a piece of good wire, strip both ends and physically attach it to the chassis of your wiper motor assy and attach the other end of the wire to the NEGATIVE battery post and try your wirpers.

My bet is it works fine.

If this fixes your wiper motor problem keep an eye out for other weird electrical things that start happening "out of the blue" because the problem with the missing ground / bad "terminal junction ground" is still out there lying in wait and it eventually will affect other circuits. I do not know where the terminal junction is on your Suburban without looking for it myself.

Kelly

with this little bit of info all i can say is, start simple check your battery terminals they may have build up keeping you from getting all the juice you need to run your lights, then check all your fuses, sounds like a fuse problem, anyway start with that

it is the alternater as the alternater is responsable for charging the battery when the battery need charging.It should run you about 60 dollars fro the alternator plus about 50 for the labor

check the wiper switch or the motor

Get the alternator checked. It should be charging at least 13.8v.
A normal voltmeter will work across the battery terminals.