steve miller

does the fuel pump on a 1985 22re have voltage when the key is on or when starting ?

raevenzero

I believe the 22re has voltage while cranking and once the AFM flapper opens. It does not have power by simple placing the key in the in position.

reelal

I'm old and retired but if I remember right when you turn the ign key to the on position the pump will get power for about 1.5 seconds unless you continue to the crank position.
If the engine doesn't run the pump will stop.

steve miller

with full battery voltage, key in on position-no voltage to pump. key to start position and cranking, no more than 10 volts. anyone know if this is normal??

thasnake04

check your relay that sits by your ecu in the passenger firewall, take the cover off and see if its clicking properly , you should be able to hear the fuel pump pumping fuel when you put key in the on position

steve miller

no fuel relay there, only a wiper relay

Terrys87

iTrader: (1)

If I recall right, you should be able to hear it for a few seconds when you first turn the key on. Be at the tank and have some one to turn the key and you should hear something at first and then it will stop.

Some other information that might help you.

Here is the location of the Circuit Opening Relay. Best to get it from behind the passenger speaker. Operates fuel pump in tank.
Circuit Open Relay


Codes... http://4crawler.com/4x4/CheapTricks/...es/index.shtml

How to get Check Engine Codes. I just put this up for others. Applies to 87 and up. 86 and older is the bottom picture. TE1/E1


The Diagnostic port for the 85-86 is on the Drivers side inner fender and is nothing the same as the 87 and up. Here is T1 and E1 jumped. The codes and engine flashes are the same as the rest of the trucks on the dash.


Codes...http://4crawler.com/4x4/CheapTricks/...es/index.shtml

http://www.youtube.com/watch?v=9qEQM...ature=youtu.be

Here is how you do a Fuel Pump Bypass on the 85/86.
Jumper wire the Yellow Plug on Drivers side. ( Jumper wire should be in both contacts for testing, I just didnt have it in for picture purposes and mostly a referece for me at a later time.)


Fp +B Fuel Pump Test for 87 and newer. Use a paper clip for better results.

steve miller

thanks for all the info. I will remove speaker and examine relay. my error codes flash when key is on. do I still need to put in jumper?