its an 88 camaro engine into my 84 s-15.

can somebody explain exactly what i have to do to get power to my fuel pump? it one wire just like on the camaro, nothing fancy. right now i have it wired up so when it gets oil pressure it turns the pump on. but how do i get it to prime the thing so i can start the engine? does the computer do that? and also,

http://www.cardomain.com/memberpage/516311/1

go to the bottom of the first page. an orange wire coming out of the reley goes to that clear connector which i'm pretty sure is the ALDL. the reley has power and grounds.



AHH! its hard to explain. what do i have to do to get my fuel pump to prime before start up, and to be on while running.

see it as if i'm starting from scratch here.

 

I can offer a little help. First, that connector is not the aldl, it is commonly reffered to as the 15 pin connector, second that other connector is for supplying power to the injectors & other items. Do you have a wiring diagram? Usually the pump power re-enters the car in the 15 pin connector on the tan/black wire (heavier gauge) then runs inside car to the rear. All the power & grounds & aldl information, gear selector switch, brake switch, c/e light, etc all goes through the 15 pin connector. Get a diagram for camaro & s-15. You can compare ecm pin id's on both ecms & easily connect the needed inputs/ouputs & add the ones you don't have. What I do is look at the ecm pin terminal id's and make sure that a wire is connected to the approrriate pins, meaning on ecm pin for brake switch, find wire from the brake switch on truck & connect it to proper wire in 15 pin, then find gear selector switch from coumn & connect it to correct one in the 15 pin, keep going until all required circiuts on ecm are are connected to something. If you get stuck let me know. I'd be happy to help.

 

You were just given some excellent info. That clear connector is the I/P (Instrument Panel) connector.

You may be a bit confused about the oil pressure and fuel pump power.

When you turn the ignition ON, the ECM sends a signal (GREEN/WHITE wire) to the fuel pump relay to energize the fuel pump. On your harness, this is a TAN/WHITE wire. That TAN/WHITE wire must be connected to the Oil Pressure Switch, Fuel Pump Power, MAF Power Relay, and ECM. Here's what happens in a properly wired vehicle....

- Key turned ON
- ECM powers Fuel Pump Relay through GREEN/WHITE wire (ECM connector location A1)
- Power is sent out the TAN/WHITE wire in the relay to energize the fuel pump

IF THE FUEL PUMP RELAY FAILS DURING OPERATION
Power would be lost on the TAN/WHITE wire coming out of the relay and the fuel pump would shut off. HOWEVER, that TAN/WHITE wire is also connected to the Oil Pressure Switch. So if you're driving along and the fuel pump relay fails, the oil pressure switch will keep power on the TAN/WHITE wire until you shut the vehicle off.

That TAN/WHITE wire also goes to the ECM and MAF Power Relay, but that's not what you're concerned about at this point.

 

alright lets see if i get this right. find the 15 pin connctor on my dash in the truck, work out the wiring with that and the camaro one. when thats done, that will tell the computer the igntions in the run position, which the computer then sends 2 seconds of power to the reley. the rely turns on for 2 seconds and primes the pump. then when the engines running the oil pressure switch takes over. is it that or the computer senses the engines running and keeps power on the wire going to the reley?

this is really helping alot. especially wildside.

so alright, this is so i don't forget...and maybe to see if i'm right
1. connect 15 pin connectors(or wires under dash in s-10)
2. ground out the computer(i forgot to do this, haha)
3. fuel pump should work:lala:

 

Not quite....

Connecting your ECM ignition power and battery power
I'm pretty sure the S-10 does not have an ignition power source in the I/P harness (connector). There are two ignition power sources coming out of the firewall on the driver side, you know, the big plug that goes to the fuse block. Look inside the vehicle at the fuse block. There should be an "ECMI" fuse (ECM Ingition) that has a 10amp fuse in it. This needs to be connected to the pink/black wire going to the ECM (location A6). The "ECMB" fuse (ECM Battery) needs to be connected to the orange wires in the ECM (location C16 and B1). If not already setup this way, the ECMI fuse should have a 10 amp fuse in it (probably currently does) and the ECMB fuse should hvae a 20 amp fuse in it (probably currently has a 10 amp or a 15 amp fuse in it).

Everything Else
Your 88 Camaro harness has the following going through the clear 15 way I/P connector:
- SES light (brown/white wire)
- Park/Neutral Indicator Switch (if automatic - orange/black wire)
- Speed Input (from instrument cluster, to ECM...brown wire)
- ALDL (orange wire, white/black wire, black/white wire, tan/black wire, maybe a few others)
You need to figure out what is coming out of the ECM and going to the I/P connector. Then you need to look at your S-10 diagrams and figure out the configuration of the S-10 I/P connector and match up the correct wires.

Wiring the Injector's Power
Your S-10's fuse block does not have two additional 10 amp ignition power sources for the Injectors, you will have to use a relay (see diagram below) to power the Injectors. Connect any vehicle ignition power source to the relay's coil high (86), a vehicle ground source to coil low (85), a battery power source to the relay switch (30), and the injector power wires to the relay contact (87). The Injector's power wires must each use a 10 amp fuse in the circuit before connecting to the relay contact (87)...one 10 amp fuse for each bank of injectors. When the relay receives a signal from your vehicle's ignition source, the coil will switch power from the battery to energize the injectors. Personally, I'd grab a signal from the heavy pink wire coming out of the fuse block and going to the coil....connect that to the relay's coil high (86).



If you still have trouble, contact me privately at mike@s10wildside.com and I'll give you my phone number. You might also be interested in the V8 TPI swap I did in my S-10. http://www.s10wildside.com

 

alright i got it. thanks again mike. sorry it took a while just to hook up those 3 wires .

mike-
i'll probaly get back to you soon about wiring evreything else up. going to get the diagams i was telling you about and have a go at it myself. it doesn't look that hard.