elvis8310

Ok, I installed a new engine about a week ago. I had a b18b obd1 and went to a b18b obd2. I used the same harness in the swap. The harness is from a 97 civic ex obd2(bought new one fron honda). The car was charging before the swap but now it is not. I am using the same alternator on the new engine as was used before. It is an obd2 alternator high out put. I have changed alternators to the one that came with the engine but still no charge. I disconect the lead wire from the fuse box to the alternator and the wire reads at 14.4 at 2000 rpm. When you hook it back up to the fuse box it does nothing. I have no batterie light when i turn the ignition on so I did the ground the white and blue wire and it turns on as stated in the manual. The manual dones not tell you why the light does not work or were to check as to why it does not turn on. I have cleaned and checked all the ground wires and the work just fine. I have also changed ecu's with another one to see if it was the problem but nothing different.
Ok, stock harness was not modified at all. I tried the stock obd1 ecu with a rywire obd2 to obd1 reducer and the stock obd2 ecu, nothing changed. I have also replaced that fuze under the dash and no change. The car starts and runs fine, just no charge from the altornator when it is hooked up to the fuze box.

I am now thinking of buying a new fuze box to see if the external load detector is shot. Is there a way to check this before I buy a new one?

Ok need to tell you all I also had my alternator and motor mounts powder coated blue and no metal is showing at all. So if these act as a ground they is not a ground for the Alternator.


Ok, this is what I have done so far, now were else can I look? People throw me a bone and help a lost mechanic ok. I have had 4 other people try to help me and they are lost also. I need my car to drive and well am lost as to what else to do to fix this car.

Former User

Yeah, you may have problem with the electrical load detector (ELD). Is it grounded properly and wired correctly to the ECU?

Is the CEL ON?

elvis8310

well all grounds are good unless powder coating the alternator mounts won't let ground right. The ecu is hooked up right and not sure what you mean by CEL ON

Former User

Is the Check Engine Light (CEL) ON?

https://honda-tech.com/zerothread/1901557


Modified by RonJ@HT at 9:52 AM 4/20/2008

elvis8310

I ground off all the powder coating on the mounting points for the alternator brackets and that fixed it.