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Prelude SH to Base Engine Swap Wiring Harness Help?

 
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Old 11-08-2009, 05:13 PM
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Icon5 Prelude SH to Base Engine Swap Wiring Harness Help?

I recently bought a 97 SH Prelude and threw a rod in it a couple days later. But thankfully i have a base engine outa my 98 prelude that im about to drop in. I know the axles are diff and some other differences no biggy got those taken care of my concern is should i also swap out the sh wiring harness for the base 1 since i have it. I dont wana have to pull the harness if i dont have to but it seems that a couple plugs are in different place and if i just remove the ATTS subharness would that be fine? Also should i switch the ECU's? Thanks

Also if anyone needs parts I have a 1998 base prelude im parting out.
Plus the SH transmission and ATTS unit.
2nd gear synchronizers are bad in the transmission will also trade for a base transmission.
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Old 11-08-2009, 07:32 PM
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Re: Prelude SH to Base Engine Swap Wiring Harness Help?

so then are you swapping the motor and trans? or just the motor? cuz if its just the motor i think its a straight drop in.. they are both h22a4's
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Old 11-08-2009, 09:02 PM
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Re: Prelude SH to Base Engine Swap Wiring Harness Help?

you don't have to change out the wiring harness in your SH in order for it to be a Base. You can still use the same motor harness as well as the interior harness. I did a swap in my friends SH, but we only changed out the tranny and everything bolted up just fine and worked perfectly fine. He just had a few extra plugs cause of the ATTS unit
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Old 09-14-2010, 08:29 PM
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Re: Prelude SH to Base Engine Swap Wiring Harness Help?

Hi i have a 99 prelude and i did a tramns swap auto to 5 speed and i change the harness on the engine and the harness that goes in the ecu but my problem is the car won't start the starter won't crank is like power don't go to the starter can someone please help me and tell me what i did wrong thanx
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Old 04-09-2013, 12:55 AM
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Re: Prelude SH to Base Engine Swap Wiring Harness Help?

i have a 97 prelude sh and swaped to a base block and tranny i kept the sh harnest..and everything is hooked up and car wont start.its getting fuel and spark..just wondering if theres something im missing?
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Old 01-15-2017, 04:15 PM
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Re: Prelude SH to Base Engine Swap Wiring Harness Help?

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Originally Posted by eddavila99 View Post
Hi i have a 99 prelude and i did a tramns swap auto to 5 speed and i change the harness on the engine and the harness that goes in the ecu but my problem is the car won't start the starter won't crank is like power don't go to the starter can someone please help me and tell me what i did wrong thanx
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Originally Posted by akers09 View Post
i have a 97 prelude sh and swaped to a base block and tranny i kept the sh harnest..and everything is hooked up and car wont start.its getting fuel and spark..just wondering if theres something im missing?
I know this is old af but your no start issues could be attributed to the immobilizer system. If you changed ecu's and are not running your original P5M/P5P ecu and didn't have the ecu reprogrammed from Honda or by other means (ie. immo bypass chip installed), this directly would not let the car start.

The other thing that could be a culprit with a no-start isse with auto to manual conversions is the left over auto shifter mechanism wiring. A plug on the shifter mech wiring needs to be jumped in order to put the car in a 'manual' mode. I forget the exact detail but this happens in the civic/integra scene in these conversions. I believe it relates to a clutch switch.
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