Hi,
Car’s starter turns the Car motor over strong?
Posted a few pics below of the circuits so you know what you’re testing. Note the 20A fuse under the Hood.
!!Please post if engine turns over ok with key, or not. Also, if the pump primes as it should.!!
Have a few questions with some initial (vague) tests to attempt, meanwhile. Will help narrow it down .
1) How did this issue present itself? Did you let it sit for a few days or longer and the vehicle didn’t start, etc? Last thing that occurred prior to failure?
2) When you turn the key, does the fuel pump start running for about 7 seconds? (Prime). This should rule out a CCRM issue.
3) Do you have a factory or aftermarket Security system installed, have you noted a Security light at any point?
4) Check for 12VDC at both connections on the inertia switch, using a clean chassis area for grounding the VOM’s other lead (Wires Pink & Green, diagram #1). May also temporary jumper the 2 wires.
5) Check for power at the Plug going to the fuel pump with your VOM, use a clean area of Chassis with VOM on DCV. Someone needs to turn key to on so power for pump prime is present....Piercing the wires Insulation with Pins, tape both to affix, do NOT let them touch each other or Ground when testing! Check with VOM.
Ground, or power is missing, check connector pins for corrosion. Not rocket science, but can be irritating.
...... Verify Ground is present at the connector, use other lead to a clean Chassis area for Ground. VOM on audible continuity.
- Use a helper to cycle the key to turn on for pump prime.-
6) Check what battery voltage you have at the terminals, should be about 12.5-13.8V. Add a charger overnight after verifying your Grounds. Ground to block, block to Chassis, battery to Chassis, battery to CPU.
7) Is there anything else in the vehicle that does not function? Is the Car a Convertible?
8) Re-Check all your fuses. Under dash, underhood fuse shown using a VOM on each of the (2) steel pieces protruding through each fuse, so fuses need not be removed.
Find good Chassis ground. Test, and affix VOM lead in place. Start checking both ends of fuses with VOM on DCV. No power at either end, switch VOM to Confinuity & test with VOM leads across both ends of metal.protruding through tops of de-energized Fuse(s). (Diagrams below)..
9) Have many keys on your ring? ignition switches are not meant to carry 10 keys. Try cycling the Key several times to see if you can get the pump to run for the initial prime.
If you have tilt steering, try readjusting..
10) Follow the wiring from the pump to the CCRM up front, look for damaged wiring, poor connections.
-Hopefully something less expensive, FYI: Fuel Pump relay is located in the CCRM, The CCRM is located on the passenger side fender under the hood near the air cleaner assembly. It is replaced as a unit, unless you’re comfortable enough to disassemble.
You may be able to find a used CCRM if that turns out to be the culprit, will be easier with your feedback, once posted.