okay i dont know what i need but here is my horn
http://cgi.ebay.com/ebaymotors/2-TWO-Train-Horn-12-24v-SOLENOID-Pair-of-Air-SOLENOIDS_W0QQcmdZViewItemQQ_trkparmsZ66Q3a2Q7c65Q3a15Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a0Q7c293Q3a5Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZitem5ace67c0b8QQitemZ390009962680QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories
here is the compresser
http://cgi.ebay.com/ebaymotors/COMPRESSOR-FOR-AIR-HORN-REMPLACEMENT-12V-ONE-LOUD-SOUND_W0QQitemZ110389869686QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item19b3bfbc76&_trksid=p4506.c0.m245&_trkparms=65%3A2%7C39%3A1%7C240%3A1318
here is the air tank
http://cgi.ebay.com/ebaymotors/Hoosier-Air-Tank-4×4-Air-Ride-Spare-150-psi-30-x-7_W0QQitemZ190308546612QQcmdZViewItemQQptZOther_Vehicle_Parts?hash=item2c4f45f834&_trksid=p4506.c0.m245&_trkparms=65%3A2%7C39%3A1%7C240%3A1318#ebayphotohosting

Am having trouble with the truck starting. Have replaced relays, starter/solenoid, battery is new. Vehicle starts, but when shut down and attempt to start again it won't turnover.
If I try the next morning it starts. It also started up right after replacing parts. I am figuring the next thing to replace [...]