milanoitr

Its a 99 em1
Yes i have searched.well my fuel pump wont turn on my ecu doesnt have power so i checked my main relay and it doesnt have a constat 12v wire it has a wire that gets power with ign on and a wire that gets power when cranking the car but it diesbt have a constant..now from what i read if it doesnt have a 12v constant my fuel pump or ecu wont get power.my question is where does this wire get power from and y doesnt it have power..ive checked all my grounds they are good...fuses are all good so im stumped where else can i look to try and get this thing fixed...also i ran a wire from my battery to my fuel pump to see if it primes and it doesnt,SHOULDNT IT prim with a direct power...someone help me on this i need my car running

milanoitr

Also replaced main relay with a known good one and its still the same thing

Civic2Fast

have you installed a new fuel pump or adjustable FPR lately???

Former User

Check whether 15A hood fuse 44 or 15A dash fuse 13 is blown.

milanoitr

No i have installed any of those lately

milanoitr

No i have installed any of those lately....all fuses under hood and under dash are good

Former User

I not worried about any fuses but the two I mentioned. Do both of those installed fuses have battery voltage at both top test tabs?

milanoitr

Yes both have battery voltage

Former User

Unplug the main relay, turn the key to ON(II), and then jump terminal 7 to terminal 4 (7-4). Does the fuel pump run? Do the same test for 5-4. Does the fuel pump run?

milanoitr

When i jump terminal 5 and 4 it turns on jumping 4 and 7 it doesnt

Former User

Are you absolutely sure that installed fuse 44 has battery voltage on BOTH top test tabs? Click the fuses link in my signature.

milanoitr

Yes my test light lights up on both ends of the fuse with the ignition on

milanoitr

When i turn ignition on my fuel pump doesnt prim,also igp1 and 2 dont get power on my ecu plug.but the yellow/black wire on connector c101 has power

Former User

Test continuity of the wire running from fuse 44 to the main relay plug.

milanoitr

Where do i find the wire running off fuse 44 at and what prong on the relay plug

milanoitr

Can i just run a wire off the yellow/black wire on the c101 connector to prong 7 on the main relay???

Former User

It's the Wht/Blk wire. Measure continuity between installed fuse 44 and terminal 7 of the main relay plug.

milanoitr

How to i check continuity?? And is the white/black on the main relay supposed to be the one with a constant 12v

milanoitr

Ttt

jbpnoman

You test for continuity using a voltmeter set to continuity mode.

milanoitr

Looks like i need to get a voltmeter ...if there is no continuity what can the problem be

teggi

wire would be split in two, meaning no power. i would do a volt drop test to be sure. checking for continuity will only tell you that there is contact but wont tell you if you have power going through and how much. a DMM from any auto parts store will work, and also comes with instructions on how to do a volt drop.

milanoitr

I dont have any power to the #7 prong on the main relay so will there even be a point to doing a continuity test

Former User

The test was to verify the problem.

Pierce the insulation of the Wht/Blk wire a few inches from the main relay plug. Do you measure battery voltage there?

milanoitr

Ill try that when i get home