Chevy Blazer Wiring/Fuel Pump

1988 CHEVROLET BLAZER
6 CYL • 4WD • MANUAL
Avatar
COURT JESTER
  • MEMBER
  • 6 POSTS
replaced wiring harness in 1988 S10 Blazer and have 2 wires that i dont know where they hook up, also fuel pump is not engaging
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Attached Media
Aug 15, 2011 at 4:21 AM
Advertisement
Avatar
FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
where on truck are these mystery wires located?
Aug 15, 2011 at 5:31 AM
Avatar
COURT JESTER
  • MEMBER
  • 6 POSTS
they're in the engine bay on the passengers side, however ive found the port for the latter one, it hooked in to the transmission
Aug 15, 2011 at 4:20 PM
Avatar
FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
so the black plug has a home but the 1 with green/yellow wires is still homeless? is the fuel pump working yet? do you have old harness? is there the same wire/plug on old harness?
Aug 15, 2011 at 4:34 PM
Avatar
COURT JESTER
  • MEMBER
  • 6 POSTS
its green and black...and no, pump is not working yet....but i looked on the fender where the relays are...and the new harness only has 2 where the old has 3 so im guessing that might be the issue now
Aug 16, 2011 at 3:15 PM
Avatar
FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
when you say new do you mean new or just replacement used harness?
Aug 16, 2011 at 6:18 PM
Avatar
COURT JESTER
  • MEMBER
  • 6 POSTS
replacement used from a 88 S10 2.8L
Aug 17, 2011 at 4:07 AM
Avatar
FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
so not exact same model vehicle?
Aug 17, 2011 at 4:30 AM
Avatar
COURT JESTER
  • MEMBER
  • 6 POSTS
they should match up perfect...the blazer was based off the s10....all i bought was the engine and transmission...i'm guessing when i bought it it didnt have 100% of stuff included...anywho how would i install the relay and wiring?
Aug 17, 2011 at 4:48 AM
Avatar
FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
could you explain exactly what the project consists of altogether? are you installing a motor and trans into a vehicle and the wiring that is in it already is not matching up? thanks
Aug 17, 2011 at 4:23 PM
Avatar
COURT JESTER
  • MEMBER
  • 6 POSTS
okay it burn on me a few months ago, i bought an engine to use the harness off it, replaced harness, using the engine that was in the blazer originally...the relays on the drivers side fender had 3 relays on it on the old harness, the new only has 2.
Aug 17, 2011 at 5:15 PM
Avatar
FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
seems unlikely that something as important as fuel pump relay would be missing? maybe it's some kind of emissions relay?
Aug 17, 2011 at 5:51 PM
Avatar
FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
the 2 relays should be AC and fuel pump on an s10 pickup
Aug 17, 2011 at 6:25 PM
Avatar
FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
try this
Image (Click to enlarge)
Attached Media
Aug 17, 2011 at 6:58 PM
Avatar
FIXITMR
  • CAR REPAIR CONTRIBUTOR
  • 9,990 POSTS
compare with this
Image (Click to enlarge)
Attached Media
Aug 18, 2011 at 1:57 AM
Avatar
COLTONNM
  • MEMBER
  • 1 POST
Did you ever figure out that green black wire connector??
Nov 24, 2019 at 6:39 PM
Avatar
JOHNNY1268
  • MEMBER
  • 1 POST
Did you figure what the wires where for?
Dec 18, 2020 at 12:31 AM
Avatar
DANNY L
  • CAR REPAIR CONTRIBUTOR
  • 5,648 POSTS
Hello, I'm Danny.

You've attached to a years old question. What we ask is for you to start a new question including all your vehicle information. Here is the link:

https://www.2carpros.com/questions/new

Once you get back to us with your information we can provide you with any wiring diagrams you need. Hope this helps and thanks for using 2CarPros.
Dec 20, 2020 at 3:48 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.