Is the asd relay just for the fuel pump? I have already switched out the wiper relay with the fuel pump relay.

?????

 

Just looked it up in my service manual, this is my understanding of the ASD. ASD is for the fuel pump and coil, the fuel pump relay connects to one of the pins on it. This is the relay that the pcm manipulates to shut off the truck when you turn the key off. If the relay (or the wiring up to it) is going bad, the little switch inside of it may be opening the circuit and killing the truck.

A way to test it is: get two sets of wire with gator clips on the end, connect one set to pin# 85 and one to #86 hold the relay to your ear and connect other end of the leads to the + and - terminals on the batt. You should hear a pronounced click noise. This indicates that the relay is good. Do this several times, it should click every time. If it doesnt click replace the relay.

This is what the service manual states (requires an ohmmeter):

² When the PCM energizes the ASD and fuel
pump relays, terminal 87 connects to terminal 30
This is the On position. Terminal 87 supplies voltage
to the rest of the circuit.
The following procedure applies to the ASD an
fuel pump relays.
(1) Remove relay from connector before testing.
(2) With the relay removed from the vehicle, us
an ohmmeter to check the resistance between term
nals 85 and 86. The resistance should be 75 ohms +/-
5 ohms.
(3) Connect the ohmmeter between terminals 30
and 87A. The ohmmeter should show continuity
between terminals 30 and 87A.
(4) Connect the ohmmeter between terminals 87
and 30. The ohmmeter should not show continuity at
this time.
(5) Connect one end of a jumper wire (16 gauge or
smaller) to relay terminal 85. Connect the other end
of the jumper wire to the ground side of a 12 volt
power source.
(6) Connect one end of another jumper wire (16
gauge or smaller) to the power side of the 12 vol
power source.

If you confirm that the relay is good, pull the PDC (power distribution center) and locate the wires to that specific relay. Wiggle them gently to see if they are loose (skip this step if they are noticably burnt), if there is too much give, replace them (or get them in there tighter).

Edit; it appears my copy/paste job cut off every last letter in a line, I went through it and fixed all the important parts

 

Mad Scientist,

Thanks for taking the time to find the asd info in the service manual. I'll give it a try.

 

My 1999 Dodge ram 1500 sport is having the same problem. I put in a new ECM which didnt help and new ASD which didnt help. the truck will start n when i drive it it still shuts off and odom. read " no bus" but if i get out and tap on the brain or wiggle the wires it will start right up and be drivable until it feels like shutting off again. should i put a new brain in my truck or does it sound like the wiring?

 

I put in a new ECM which didnt help

should i put a new brain in my truck

Didn't you try this already, and it didn't work?