Question about 1990 Chevrolet Astro Extended

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Where do the two black wires from the switch go , orange/black goes to ecm

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More information needed to solve this issue. What switch, and what are you trying to do?

Posted on Jul 22, 2009

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94 s10 fuel pump relay clicking no start


The clicking noise at the relay indicates that the relay is bad, or that the wires to the relay and/or connector is bad.

A relay is an electronically activated switch. Inside is a coil. When 12v+ is applied to one end of the coil, and a ground is applied to the other end, the coil gets charged, creating a magnetic field. This magnetic field literally moves a metal lever from position A to position B. One end of the lever is attached to constant battery power. When coil not energized, the lever rests in postion A (which in the case of the fuel pump relay is feeding the battery power to an unused terminal). When the coil is activated, the lever moves to position B (which in this case is a terminal connected to your fuel pump wire). Thus, when the relay is activated, 12v+ is being directed from the battery to the fuel pump.

This fast clicking indicates that the relay coil is not getting a constant voltage or ground supplied to it, thus the lever is moving back and forth between position A and position B, either there is a wiring issue, a connector issue, or an internal issue with the relay.
The relay has 4 wires, black, grey, orange, green with white stripe.
black = ground
orange = battery = 12v+ always
grey = wire out to fuel pump (on some cars this wire is tan with white stripe)
green/white = signal wire from ECM

When key is turned ON, the ECM sends 12v+ out on the green/white wire to the relay for about 2 seconds - this activates the relay coil for 2 seconds, thus running the pump for 2 seconds (priming). When the vehicle is started, the ECM sees a constant ignition signal from the ignition module, and sends a constant 12v+ out on the green/white wire, thus activating the relay coil constantly, and thus running the pump constantly.
When car shut off, no more constant ignition signal, thus ECM stops sending the 12v+ out on the green/white wire.
So, you can kind of test your connector ...
1) remove connector from relay
2) jumper a wire from the slot for the orange wire to the slot for the grey wire - fuel pump should run - wiggle wires to verify at connector
3) probe black wire slot with ohm meter - make sure black wire has constant ground - wiggle wires at connector
test relay ...
1) remove relay from connector
2) rig a ground wire to the tab that had the black wire when in connector
3) apply 12v+ to the tab that had the green/white wire - relay should click once and do this every time you apply the 12v+

That should help you track it down to either a connector problem, a wiring problem, or a relay problem.

Nov 28, 2015 | Cars & Trucks

1 Answer

2.7l engine, left bank at rear of engine on top of intake. two wire connector orang w/green strip and black wire. what/where does it connect to


Could be many things. Orange/green is a power wire, black is ground. Black could be a engine ground or ECM ground. Orange/green is power. 12 Volts. Check engine light on? If not, some plugs don't go to anything. They use one harness for many different models. Yours may not have this option.

Aug 07, 2015 | 2004 Chrysler Sebring

1 Answer

Where does the orange silver wire go from the horn relay


is it a spare wire ? the wires from relays are generally all used so it will either go to the switch,horn itself ,earth ,live , usually the earth is black ,the power is red and the switch/ignition live is yellow so i would say the other colour goes to the user in this case the horn, could'nt actually find a orange/silver wire on honda wiring diagram but there is orange/grey hope this helps

Apr 24, 2014 | 2002 Honda Civic

1 Answer

I need a gmc safari diagram for fuel pump 1991


I don't usually do diagrams due to copyright laws.
From the fuel pump you have a gray wire and a black wire.
The black is ground and the gray is power from both the pump relay and the oil pressure switch.
The oil pressure switch provides power to the pump once the engine starts.
At the relay, you have a green and white wire that provides power from the ECM with the key switch on. You have an orange wire that provides power from a 15amp fuse.
The gray wire going to the pump, and a black and white wire for ground for the relay.
The ECM provides power for 3 seconds when the key switch is turned on to boost line pressure for startup.

Jan 30, 2013 | 1997 GMC Safari

2 Answers

Please I need help. I have a,1995 geo prizm. I have replaced the fuel pump, fuel filter, fuel pu relay switch, temp sensor. Took it to a shop and hooked up to machine for check engine light and found out...


It's not really a switch. Below is a desciption of what the code means. In about 50 percent of the cases it's a bad connection which is causing the failure and there are many tests to check different circuits. In order to rule out the ignitor here is a quick test you can do. Below is a picture of a breakdown of you distributor (yes the ignitor is in the distributor). Take the distributor cap off. Using a digtal volt meter check with your postive probe the black wire terminal connected to the ignition coil and ground the negative probe to a good grouns like the battery. Make sure you are getting at least 10 to 12 volts. If you are check the connection at the brown and black wire between the coil and the ignitor and make sure all is good (like good continuity) If all is good, chances are the ignitor is faulty. If you are not getting the voltage on the first test right at the black wire terminal at the coil the coil could be faulty. As I said it's a 50/50 thing on this code as far as wiring or a componant such as the coil or ignittor. I have found in the past that in most cases if say a coil or ignitor goes bad, it's just bad and you end up in a no start situation but there are those odd cases that outside temps effect everything like engine heat or a componant over heating.Hope this helps and good luck.

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Mar 11, 2012 | 1995 Geo Prizm

2 Answers

How to disarm or reset an alarm system for a 1996 Jeep Cherokee?


Hope this helps:- Factory Disarm Purple/Yellow (-) Driver's Kick Panel Black Connector at ECM -slice into this wire, & wire it to ground, this disables the alarm.
Cavity/Fuse Diagram (1996 Grand Cherokee, passenger side kick plate to find, Owner's Manual pgs 205-206): 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Row 1: 1-6 (left to right) Row 2: 7-12 Row 3: 13-18 Row 4: 19-22
1996 Jeep Grand Cherokee Fuse Panel (Passenger Side kick panel) Reply

CAVITY FUSE DESCRIPTION 1 -10 amp (RED) Radio 2 -15 amp (Lt Blue) Cigarette Lighter 3 -10 amp (RED) Rear Washer Switch, Body Controller 4 -10 amp (RED) Airbag 5 -10 amp (RED) Lamp Out Module, Overdrive Switch, OBD II 6 -15 amp (Lt Blue) Vehicle Information Center/Graphic Display Module Park & Side Lamps, Overhead Console Lighted Visor, Automatic Dimming Mirror 7 -20 amp (Yellow) Body Amp, Cluster, Body Controller 8 -20 amp (Yellow) Rear Wiper Motor, Flipper Glass Solenoid, Cargo Lamp, Trailer Tow 9 -15 amp (Lt Blue) Brake Switch 10- 10 amp (RED) Rear Window Defroster 11 -10 amp (RED) ABS Module 12 -10 amp (RED) Heater-Ventilation-A/C Control & Recirculation Motor 13 -15 amp (Lt Blue) Hazard Switch, Turn Signal Switch 14 -15 amp (Lt Blue) Spare 15 -15 amp (Lt Blue) Spare 16 -10 amp (RED) Right & Left Courtesy Lamp, Glove Box Lamp, Halo Lamp Cargo Lamp, Underhood Lamp, Dome/Read Lamp Right & Left Visor, Automatic Dimming Mirror 17 -15 amp (Lt Blue) Radio Illumination, Tail Lamp, Graphic Display Module, Park & Side Lamps, Headlamp Switch, Body Controller 18 -20 amp (Yellow) Spare 19 -15 amp (Lt Blue) Passing Light 20 -15 amp (Lt Blue) Radio, Heater-Ventilation-A/C, Vehicle Information Center 21 -15 amp (Lt Blue) Power Outlet 22 -10 amp (Blue) Airbag Module -------------------------------------------------------------------------------------
1996 Jeep Grand Cherokee Alarm, Remote Starter, Keyless Entry Wiring Information Constant 12V+ Pink/Black Ignition Switch Harness Starter Yellow Ignition Switch Harness Ignition Dark Blue/Gray Ignition Switch Harness Ignition 2 Red/Black Ignition Switch Harness (for AC) Accessory Black/Orange Ignition Switch Harness Tach Gray/White Coil Brake Switch White/Tan Brake Switch Trunk Pin n/a Works with Dome Light Parking Lights Blue/Red (+) Left of Steering Column or Light Switch Head Lamp Tan/Black Light Switch Factory Disarm Purple/Yellow (-) Driver's Kick Panel Black Connector at ECM -slice into this wire, & wire it to ground, this disables the alarm. Door Trigger Yellow (-) Driver's Kick Panel see notes Door Lock 5/Wire in Driver's Inside Driver's Door Orange/Purple Lock Pink/Black Unlock Door Unlock and Passenger's Doors Inside Passenger's Door Black/White L Pink/Black Unlock Horn Wire Gray/Orange (-) Steering Column Windows Up LF=Light Blue, RF=Brown/White, LR=Blue/White, RR=Gray/Black Doors Windows Down LF=White, RF=Purple/White, LR=Red/Black, RR=Green/White
• Cruise Control Information • Stereo Information • View all Jeep Vehicles

Dec 18, 2010 | 1996 Jeep Grand Cherokee

1 Answer

What color Is the o2 sensor heater sure n the ground I got 2 red wires,a black wire ,n a Orange wire what is the heater wire and ground wire ?


I ASSUME you mean the rear oxygen sensor???? 1 red wire is the o2 signal, the other is the o2 heater ground. the Orange is heater power The red wire in cavity 3 is the heater ground (terminal 20 at ECM). . the #1 cavity is BLACK, #2 RED, #3 RED #4 ORANGE looking at the connector its hard to tell you over print, but #1 is upper right, 2 upper left, 3 lower right, 4 lower left.

Nov 16, 2010 | 2000 Hyundai Elantra

1 Answer

Blowers Stopped Working Focus 99 1.6 Ghia


check for power at the blower motor. then check if it has good ground . ground wire is black/orange and goes through blower switch, then to ground. If you ground the black/orange wire at the motor and it works, you either have a bad blower switch or wire connection (I do not have a diagram for your car, this is based on a 2000 2.0 focus) the wire ends up at the left A pillar. black wire.

Oct 07, 2009 | 2000 Ford Focus

1 Answer

2001 Chevrolet Impala 3.8 fuel pump wiring diagram


The wires should be grey, orange and black, purple, and a black wire. The purple goes to purple, grey to gray. The orange and black goes to the small black wire on your car harness and the black goes to the bigger black.

Apr 30, 2009 | 2001 Chevrolet Impala

1 Answer

My 1994 suburban engine stops. No fuel, no MIL light.


I checked all of the fuseable links and they were all good. Next I decided to check all the power wires to the ECM and also the grounds from a wiring diagram because the Mil is controlled by the ecm and the bulb was good. The ecm is located behind the glove box. Bingo, the orange wire was only reading 3-5 volts at the ECM, but 12.5 volts after the fuseable link at the underhood fuse block (passenger side firewall). I ran a temp wire directly from after the fuseable link to the orange wire at the ecm and the ecm turned back on and the Mil or "check engine soon" light came on too. The truck started up and has never run smoother.

Note that at first the truck just stalled out and I could restart it right away with no error codes. Eventually the stalling became more frequent with longer reset times required. Once it threw a "code 54" and I thought it was fuel related as each time the gas stopped and I could still start the truck with gas poured into the TB. Ignition ok. My fuel pump turned on and ran if I tested it. I even checked the pressure regulator and the fuel filter to no avail.The orange wire that powers up the ecm is technically part or the fuel pump relay circuit as it also feeds the fuel pump relay 12.5 volts all the time. The thin orange wire from the fuse block is joined to two other thin orange wires in the large group of wires that heads to the ecm along the firewall behind the engine. I had to dig it out of the many wires to find it and remove a lot of tape. It is amazing to me that this one little orange wire could cause so much grief and be so hard to track down. I could not have afforded to take this problem to the Dealer.

Mar 25, 2009 | 1994 GMC Suburban

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