HELP! differences between '98 and '99 civic ex engine wiring harnesses??
01-11-2007, 03:58 PM
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HELP! differences between '98 and '99 civic ex engine wiring harnesses??
iam doing an engine swap for a friend, his '98 ex threw a rod, and he bought a '99ex parts car, and when i pulled the motors from the 2 cars, i disconnected the the harness from the ecu, and left the harnesses attached to the engines, and i noticed the plugs are different where they plug into the ecu, so my question is, can i swap the '99 ecu into the '98, or do i need to use the '98 ecu and harness, and if so, are all the sensors and distributor, etc. the same?
01-11-2007, 04:02 PM
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Re: HELP! differences between '98 and '99 civic ex engine wiring harnesses?? (gezzuzz)
01-11-2007, 04:04 PM
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Re: HELP! differences between '98 and '99 civic ex engine wiring harnesses?? (gezzuzz)
are you trying to use a 99 motor harness with 98 ecu?
just want to get it straight
just want to get it straight
01-11-2007, 04:06 PM
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Re: HELP! differences between '98 and '99 civic ex engine wiring harnesses?? (gezzuzz)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gezzuzz »</TD></TR><TR><TD CLASS="quote">are you trying to use a 99 motor harness with 98 ecu?
just want to get it straight</TD></TR></TABLE>
I'm pretty sure that's what he's getting at which leads me to your last post:
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gezzuzz »</TD></TR><TR><TD CLASS="quote">you can get a obd2b to obd2a harrness</TD></TR></TABLE>
just want to get it straight</TD></TR></TABLE>
I'm pretty sure that's what he's getting at which leads me to your last post:
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gezzuzz »</TD></TR><TR><TD CLASS="quote">you can get a obd2b to obd2a harrness</TD></TR></TABLE>
01-11-2007, 04:10 PM
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Re: HELP! differences between '98 and '99 civic ex engine wiring harnesses?? (PhatBoy5015)
Just use the 98 harness and 98 ecu for the 98 car. Did the 99 harness have an extra plug under the dash going into the ecu?
01-11-2007, 04:10 PM
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Re: HELP! differences between '98 and '99 civic ex engine wiring harnesses?? (Syndacate)
i just didn't want to get it backwards..
and why can't you ge the ecu off the parts car?
and why can't you ge the ecu off the parts car?
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01-11-2007, 04:15 PM
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Re: HELP! differences between '98 and '99 civic ex engine wiring harnesses?? (gezzuzz)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gezzuzz »</TD></TR><TR><TD CLASS="quote">i just didn't want to get it backwards..
and why can't you ge the ecu off the parts car?</TD></TR></TABLE>
Chances are it was removed.
It's hard to find a parts car with the ECU still in it, especially in terms of Acuras and Hondas. I don't think I've ever seen a honda/acura in a junk yard with the ECU still in it. People raid that **** like gold. They're easy to remove, and worth 100 easy.
and why can't you ge the ecu off the parts car?</TD></TR></TABLE>
Chances are it was removed.
It's hard to find a parts car with the ECU still in it, especially in terms of Acuras and Hondas. I don't think I've ever seen a honda/acura in a junk yard with the ECU still in it. People raid that **** like gold. They're easy to remove, and worth 100 easy.
01-11-2007, 05:00 PM
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I would just swap the harness off the 98 motor and use it with the right ecu. it only takes a few minutes to remove a harness of hondas so just save yourself a little cash so you dont have to buy the jumper harness.
01-11-2007, 07:00 PM
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Re: (D1SKOOLBUS)
i have the computer for the parts car, i drove it into the shop.. it was a running car, it was hit in the back... can i use the '99 computer and harness in the '98?
01-11-2007, 07:12 PM
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Re: (D1SKOOLBUS)
options..
1. put the 98 harness on the 99 motor with a 98 ecu.
2. 99 motor ecu and harness
3. 99 motor 99 harrnes 98 ecu with obd2b-obd2a jumper harness
1. put the 98 harness on the 99 motor with a 98 ecu.
2. 99 motor ecu and harness
3. 99 motor 99 harrnes 98 ecu with obd2b-obd2a jumper harness
01-11-2007, 07:36 PM
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STOP!
The conversion harness will not work!
I know it wont because I did the same with my car. 97 Coupe, blown motor switched a OBD2B wired B16A2 and everything clicked nice until the green plug had half the wires that my car does.
Tried buying harness and all that stuff. Diffrent ECU's bla nothing work until friend said man your using the wrong harness. We changed it car turned on and gauges work RPM everything.
Nope the 99 is OBD2B and wont comply with the vehichle of 96-98 because its OBD2A. Car will start and work. No gauges, no tach, no speedo no bla bla bla. To much hassle CEL will be on. Why because the harness that connects to the vehicles interior harness dont match up.
The plugs will be the same. Everything will match up. Everything is OBD2 but the only plug that wont work on the 99 harness with the 98 car is the one near the ECU that is green. The 99 will have diffrent wires in diffrent locations that the matching of the 98.
Easy way with no cost.
Remove the 98 Harness from the motor. Both motors are still outside as I presume. Start from left to right facing the intake manifold. Crank Fluctuation Sensor, Knock, Alternator, Injectors, all the way down to the right by Vtec Solinoid, Thermostat, TPS, Starter wire, just take on plug look at the colors on the harness and plug it in so you dont get plugs confused. By the time you drop the motor in the car everything is basically 98! Whalla no CEL, gauges work everything is nice and unless the motor has a bad IAVC nice idle, or you didnt get plugs everything will run on the 98 P2P.
THIS MIGHT ONLY BE ON INTEGRA MOTOR! Im not sure if it was because it was OBD2B or Integra. Single cam wise they might they might not. Plus the Crank Fluctuation Sensor is right under the Alternator near the Timing Belt cover.
P.S The only plug that might not work is the Crank Fluctuation Sensor. On my B18C the plugs didnt fit but looked similar. Nor the wires were the same color. I pulled up the diagrams. On the motor the sensor has a blue wire and a white wire. On the 97 Harnes the plug has 3 wires. I believe the harness has White wire with Red Stripe or Vice versa and a Blue Wire with Red Stripe or Vice Versa. Cant remember. But if this is the case the WHT/RED connects with the White wire and the BLU/RED connects with the Blue wire. Very easy and the Brown is a ground. I just cut it and CEL went away.
Modified by StreetRacinThug at 9:03 PM 1/11/2007
The conversion harness will not work!
I know it wont because I did the same with my car. 97 Coupe, blown motor switched a OBD2B wired B16A2 and everything clicked nice until the green plug had half the wires that my car does.
Tried buying harness and all that stuff. Diffrent ECU's bla nothing work until friend said man your using the wrong harness. We changed it car turned on and gauges work RPM everything.
Nope the 99 is OBD2B and wont comply with the vehichle of 96-98 because its OBD2A. Car will start and work. No gauges, no tach, no speedo no bla bla bla. To much hassle CEL will be on. Why because the harness that connects to the vehicles interior harness dont match up.
The plugs will be the same. Everything will match up. Everything is OBD2 but the only plug that wont work on the 99 harness with the 98 car is the one near the ECU that is green. The 99 will have diffrent wires in diffrent locations that the matching of the 98.
Easy way with no cost.
Remove the 98 Harness from the motor. Both motors are still outside as I presume. Start from left to right facing the intake manifold. Crank Fluctuation Sensor, Knock, Alternator, Injectors, all the way down to the right by Vtec Solinoid, Thermostat, TPS, Starter wire, just take on plug look at the colors on the harness and plug it in so you dont get plugs confused. By the time you drop the motor in the car everything is basically 98! Whalla no CEL, gauges work everything is nice and unless the motor has a bad IAVC nice idle, or you didnt get plugs everything will run on the 98 P2P.
THIS MIGHT ONLY BE ON INTEGRA MOTOR! Im not sure if it was because it was OBD2B or Integra. Single cam wise they might they might not. Plus the Crank Fluctuation Sensor is right under the Alternator near the Timing Belt cover.
P.S The only plug that might not work is the Crank Fluctuation Sensor. On my B18C the plugs didnt fit but looked similar. Nor the wires were the same color. I pulled up the diagrams. On the motor the sensor has a blue wire and a white wire. On the 97 Harnes the plug has 3 wires. I believe the harness has White wire with Red Stripe or Vice versa and a Blue Wire with Red Stripe or Vice Versa. Cant remember. But if this is the case the WHT/RED connects with the White wire and the BLU/RED connects with the Blue wire. Very easy and the Brown is a ground. I just cut it and CEL went away.
Modified by StreetRacinThug at 9:03 PM 1/11/2007
01-11-2007, 08:59 PM
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Re: (gezzuzz)
well, i allredy put the engine in the car, and i decided to use the 99 computer and 99 harness, so i guess i will find out soon enough.. i wish i would have read streetracingthug's post before dropping the engine in, because that harness is a bitch to get to...
01-12-2007, 04:30 AM
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Re: (PhatBoy5015)
It's as simple as this: Whichever generation OBD2 Civic you have, is also which wire harness you WILL use. Keep OBD2a harnesses out of OBD2b cars and vice versa.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PhatBoy5015 »</TD></TR><TR><TD CLASS="quote">well, i allredy put the engine in the car, and i decided to use the 99 computer and 99 harness, so i guess i will find out soon enough.</TD></TR></TABLE>
Some people like to learn the hard way it seems.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PhatBoy5015 »</TD></TR><TR><TD CLASS="quote">well, i allredy put the engine in the car, and i decided to use the 99 computer and 99 harness, so i guess i will find out soon enough.</TD></TR></TABLE>
Some people like to learn the hard way it seems.
01-13-2007, 02:16 PM
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Conversion harness wont do ****. Thanks to EE_Chris a long time ago he explained the same **** to me and look I didnt listen. But now im in the right track. Live and Learn i guess.
03-16-2013, 10:47 PM
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Re: HELP! differences between '98 and '99 civic ex engine wiring harnesses??
I'm having the same problem but it's the other way around I have a 98 civic hb and I want to take the engine out and place it in a 99 civic 4 door so what would I need to do? Use the 98 harness
Please help and ps before someone rips on my grammer my period key is F up so bear with me
Please help and ps before someone rips on my grammer my period key is F up so bear with me
03-17-2013, 02:59 PM
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Re: HELP! differences between '98 and '99 civic ex engine wiring harnesses??
So I use the 99 harness and I need to get a 99 distributor do I need to use the ecu from the 99 or the 98 I'm guessing the 99
And thanks for the help guys
And thanks for the help guys
03-17-2013, 04:03 PM
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Re: HELP! differences between '98 and '99 civic ex engine wiring harnesses??
dash harness is probably different in the 99-00 and the 99 harness will not work
his option is to get a 96-98 engine harness and run the 96-98 ecu ONLY
his option is to get a 96-98 engine harness and run the 96-98 ecu ONLY
03-17-2013, 04:08 PM
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Re: HELP! differences between '98 and '99 civic ex engine wiring harnesses??
No, the engine is coming out of a '98 and going into a '99. Therefore it needs a '99 - '00 engine harness, distributor and ECU.