94 Caravan - fuel pump won't run

> Grounds are good, but no power on pin 3 with key on.
>
> Bingo. No power to the SBEC. (Did you check your O2 sensor wires for
> shorting?)
>
>
> > Also, found a little corrsion on 2 pins at the firewall connector, and
> > more when I pulled the boot back. Cleaned them up, but made no
> > difference. Where does the red and white wire for pin 3 go?
>
> Oof. I don't have '94 minivan wiring diagrams. Start a-followin' it back
> until you come to the problem (probably a burnt fuselink)
>
> Unfortunately, the fuselinks are within the bundle.
>
I agree with D.S., trace the Red/White wire back to the battery. Looking at
the 1991 wiring diagram, I'll bet it's very similar with the possible
exception of a fuse instead of a fusible link. It should be powered at all
times, not just when the ignition is on. The diagram shows that pin #3 has a
red/white wire that goes back to a 22 gauge white fusible link, then changes
to a 10 gauge red, then to a junction at a 6 gauge black (battery feed).
Trace it back and find where you're loosing continuity.

In article
.com>,
wrote:

> aarcuda69062 wrote:
> >
> > You -did- check all the fuses didn't you?
> Yep, checked em. I expected the SBEC to be powered by the "ignition"
> fuse under the dash, but that one has power and a good fuse. But pin 3
> isn't connected to any of the pins in the firewall connector, that's
> why I'm confused. There aren't any matching red with white stripe
> wires in that connector, so if it's supposed to be connected, it isn't.
> I guess I can pull apart the wire bundle and track it down.
>
> KC

It may have been mentioned already, but I can't find it in the
old posts. Which engine is in this thing?

I'll print the wiring diagram and post which pins have battery
voltage and which pins are powered by the ignition switch.

But I need to know which engine for your benefit so you don't go
on a wild goose chase.

In article
.com>,
wrote:

> aarcuda69062 wrote:
> >
> > You -did- check all the fuses didn't you?
> Yep, checked em. I expected the SBEC to be powered by the "ignition"
> fuse under the dash, but that one has power and a good fuse. But pin 3
> isn't connected to any of the pins in the firewall connector, that's
> why I'm confused. There aren't any matching red with white stripe
> wires in that connector, so if it's supposed to be connected, it isn't.
> I guess I can pull apart the wire bundle and track it down.
>
> KC

It may have been mentioned already, but I can't find it in the
old posts. Which engine is in this thing?

I'll print the wiring diagram and post which pins have battery
voltage and which pins are powered by the ignition switch.

But I need to know which engine for your benefit so you don't go
on a wild goose chase.

On Sun, 19 Dec 2004, aarcuda69062 wrote:

> It may have been mentioned already, but I can't find it in the
> old posts. Which engine is in this thing?

He's got the Mitsu 3.0

On Sun, 19 Dec 2004, aarcuda69062 wrote:

> It may have been mentioned already, but I can't find it in the
> old posts. Which engine is in this thing?

He's got the Mitsu 3.0

aarcuda69062 wrote:
>
> I'll print the wiring diagram and post which pins have battery
> voltage and which pins are powered by the ignition switch.
>
> But I need to know which engine for your benefit so you don't go
> on a wild goose chase.
It's the 3.0 V6, 2WD.

Thanks for the help.

KC

aarcuda69062 wrote:
>
> I'll print the wiring diagram and post which pins have battery
> voltage and which pins are powered by the ignition switch.
>
> But I need to know which engine for your benefit so you don't go
> on a wild goose chase.
It's the 3.0 V6, 2WD.

Thanks for the help.

KC

In article
om>,
wrote:

> aarcuda69062 wrote:
> >
> > I'll print the wiring diagram and post which pins have battery
> > voltage and which pins are powered by the ignition switch.
> >
> > But I need to know which engine for your benefit so you don't go
> > on a wild goose chase.
> It's the 3.0 V6, 2WD.
>
> Thanks for the help.
>
> KC

Okay, a 3.0 it is...
Pin 3 gets 12 volt battery feed via the 15 amp 'engine' fuse in
the underhood power distribution center.
This should be 12 volts all the time.

Pin 9 is 12 volts ignition feed (ignition switched) via the 10
amp #16 fuse in the instrument panel fuse block.
This should be 12 volts with the ignition in the start or run
position.

Pins 11 and 12 are power grounds.

In article
om>,
wrote:

> aarcuda69062 wrote:
> >
> > I'll print the wiring diagram and post which pins have battery
> > voltage and which pins are powered by the ignition switch.
> >
> > But I need to know which engine for your benefit so you don't go
> > on a wild goose chase.
> It's the 3.0 V6, 2WD.
>
> Thanks for the help.
>
> KC

Okay, a 3.0 it is...
Pin 3 gets 12 volt battery feed via the 15 amp 'engine' fuse in
the underhood power distribution center.
This should be 12 volts all the time.

Pin 9 is 12 volts ignition feed (ignition switched) via the 10
amp #16 fuse in the instrument panel fuse block.
This should be 12 volts with the ignition in the start or run
position.

Pins 11 and 12 are power grounds.

aarcuda69062 wrote:

>
> Okay, a 3.0 it is...
> Pin 3 gets 12 volt battery feed via the 15 amp 'engine' fuse in
> the underhood power distribution center.
> This should be 12 volts all the time.
>
> Pin 9 is 12 volts ignition feed (ignition switched) via the 10
> amp #16 fuse in the instrument panel fuse block.
> This should be 12 volts with the ignition in the start or run
> position.
>
> Pins 11 and 12 are power grounds.

It's supposed to be above 5 degrees this evening, so I'll try to get
back to it. I seem to remember at least 2 other pins being switched
12V, though - maybe like 31-32, or 32-33? It sounds like pin 3 is the
problem child, though.

KC