Just swapped my fuel pump on the 1999 V70XC and now my fuel gauge isn't working. I've ohm-ed the pump and it's showing movement. Does anyone have a wire diagram or suggestion?

 

Just changed the fuel pump to fix a low fuel pressure problem and now have no fuel guage, doesn't move off the peg when power comes on. Put an OBD reader on it and it says the fuel quantity is 49% which is accurate, so the OBD is getting the info fine, but not the guage.
Can anyone help pinpoint where the problem lies, I hate opening up that fuel tank again unnecessarily.
Thanks

 

So, I pulled the sending unit again and re-seated the two black wire plug, no fix, re-seated all plugs under the seats, no fix, re-seated the fuel pump plug adding some contact goop and presto, fuel gauge works!

 

Should've mentioned this was on my 2007 XC90 3.2 AWD, 265k km

 

What kind of contact goop?

 

From Dow Corning....got it from a helicopter mechanic friend, called 4 - Electrical Insulating Compound