90 Caravan no voltage fuel pump problem

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staruser - 03 Sep 2006 17:59 GMT

I just replaced the fuel pump on my 1990 Caravan 3.3L. Tested the old
pump with a good battery and tested the new pump before installing it.
The old pump was bad and the new worked good. Still won't start. No
voltage on the connectors under the drivers side door. Tested the ASD
relay (last relay) and found it in working order. I jumpered the fuel
pump from the battery using an old extension cord (disconnected
connectors) and the Caravan started and ran. The Haynes manual states
that the ASD relay (if bad) would shut down components like the fuel
pump, coil and the injectors. Since the engine started and stayed
running, the ASD relay isn't bad. The manual also says that there is
another relay just for the electric fuel pump, but I haven't been able
to find it. I've been looking for matching wires to no avail. Can
anyone help with my problem.

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FeMaster - 04 Sep 2006 16:13 GMT

> I just replaced the fuel pump on my 1990 Caravan 3.3L. Tested the old
> pump with a good battery and tested the new pump before installing it.
[quoted text clipped - 9 lines]
> to find it. I've been looking for matching wires to no avail. Can
> anyone help with my problem.

If the '90 is anything like the '91, there is NO specific relay just for the
fuel pump. The ASD relay is what controls the pump, and that is it...

I'd start with a continuity check between the wire in the relay connector,
and the connector under the drivers door... If you get nothing there, then
your problem is somewhere between those two points. Trace the wires if you
can. Most likely, the splice went bad. If you've ever seen a Chrysler
splice, you'll understand why... Most ridiculous and dangerous things I've
ever seen...

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Hanta-Yo-Yo - 05 Sep 2006 07:50 GMT

>> I just replaced the fuel pump on my 1990 Caravan 3.3L. Tested the old
>> pump with a good battery and tested the new pump before installing it.
[quoted text clipped - 19 lines]
> splice, you'll understand why... Most ridiculous and dangerous things I've
> ever seen...

I found the same splice problem on my 91 GC, 3.3L. Total mess in the
area where the fuseable links were. I had to go in and separate them
into individual wires with separate fuses. The whole mass had melted
together and current was being cross fed between various circuits, and
some times not, which resulted in the intermittent fuel, fuel pump
problems. I replaced three fuel pumps before figuring out that Dodge
likes to sell fuel pumps, to solve a multitude of problems. So much
for Dodge concept of a fused circuit! HYY

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