1990 E350 4.9l no start.

1990 FORD E-SERIES VAN
266 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
JBRACHMAN
  • MEMBER
  • 6 POSTS
No spark, & no fuel prime. EEC relay clicks, fuel pump relay does not. 12 volts constant at the yellow wire of pump relay, 12 volts at the Red with key on... no continuity from Tan & green wire from relay to EEC, so I ran a new one. Still nothing. Checking power at the EEC connector, I have no power at the red wire, but do have power coming from the blue wires (key on)... Does anybody have a diagram for the wire harness for the EEC? Also- is there something I'm missing, like a bad connector or something?
May 31, 2011 at 11:52 AM
Advertisement
Avatar
DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Key on Yellow 12V
Red 12V
Orange-light blue 12V relay closed
Tan-Light green Ground by EEC
Org/lt. blue powers pump through Interia switch located under right side dash on heater plenum.
May 31, 2011 at 12:08 PM
Avatar
JBRACHMAN
  • MEMBER
  • 6 POSTS
Yeah- All of that checked out. Didn't have continuity to EEC through ground, ran a new one.... Not getting power to EEC via red wire, yet there's power coming into EEC via LtBlue/pink(?) wire (key on)... CEL does come on. Shouldn't there be power coming to EEC via Red wire? (Grounds fromm EEC checked out.)
May 31, 2011 at 12:22 PM
Avatar
DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Red wire is power from EEC not to it. did you check for voltage at interia?
May 31, 2011 at 1:08 PM
Avatar
JBRACHMAN
  • MEMBER
  • 6 POSTS
Yes, have voltage at inertia... I'm thinking EEC may be shot... If I ground the Tan/LtGreen wire & turn the key on, the pump kicks on...
May 31, 2011 at 1:42 PM
Avatar
DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Bingo that's what figured was going on
May 31, 2011 at 1:47 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle