# Stupid Honda Main Relays **URL:** \ **Category:** Shift518 Automotive\ **Created:** [April 11, 2008, 7:09pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396 "2008-04-11T19:09:46Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Niskyspy](https://avatars.discourse-cdn.com/v4/letter/n/50afbb/32.png) [@Niskyspy](https://forums.speedlife.net/u/Niskyspy)\ **Post date:** [April 11, 2008, 7:09pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/1 "2008-04-11T19:09:46Z")
EDIT, I dont need the relay anymore read 3rd post down! Ok, with that taken care of. My car is just sitting outside and I barely got to work today. Main relay on my 93 Civic HB is dead and I would like to know if anyone has one lying around or has it in their parts car. The relay is located just below the fuse panel inside the car. Here are pics of the relay and its location ![http://www.travis-mc.com/dsc02850.jpg](http://www.travis-mc.com/dsc02850.jpg) TOP IMAGE: This is the relay I am looking for. ![http://www.b18c5eg.com/images/MainRelayLocations.jpg](http://www.b18c5eg.com/images/MainRelayLocations.jpg) TOP IMAGE: Look at the PIC #53, PGM-FI MAIN RELAY is what I am looking for and this is where its located. Here is some of the relay info: MITSUBA RELAY ASS’Y, MAIN RZ-0132 Japan 12V Thank you! ---
**Author:** ![Niskyspy](https://avatars.discourse-cdn.com/v4/letter/n/50afbb/32.png) [@Niskyspy](https://forums.speedlife.net/u/Niskyspy)\ **Post date:** [April 11, 2008, 7:16pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/2 "2008-04-11T19:16:12Z")
Just found out that this relay is in the following cars 1992 - 2000 CIVIC 1997 - 2001 CR-V ---
**Author:** ![Niskyspy](https://avatars.discourse-cdn.com/v4/letter/n/50afbb/32.png) [@Niskyspy](https://forums.speedlife.net/u/Niskyspy)\ **Post date:** [April 11, 2008, 8:20pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/3 "2008-04-11T20:20:47Z")
Eh, damn Honda. There was nothing major wrong with the main relay. I guess this shit was happening with lots of Honda Civics main relays. Because of poor solder application at the factory, Honda Main relays from 89-95 had a problem. Because of vibration a dry joint would create no contact on the relay board. And that is what happened with my car (fuel pump would not engage). It was all fixed for free by adding solder on top of the existing one to fix the dry joints. Now my car starts and runs ;D Here is a write up on how to do it: The Honda or Acura turns over but won’t start in hot weather is a symptom of a main relay going bad. This is the result of the poor solder application from the factory. As a consequence, raise areas on the joint indicate a “dry joint” which can lead to an open circuit. The dry, open circuit is the main cause of no start. This is partly caused by the buildup of heat on the terminals which expand, contract and subject to vibrations. It is likely that a layer of hard oxide has built up inside the solder joint. The layer of hard oxide has to be removed by desoldering. Other than this, there are no known mechanical problem with the main relay. [http://techauto.awardspace.com/mainrelay.html](http://techauto.awardspace.com/mainrelay.html) ---
**Author:** ![crAppAchic0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/crappachic0/32/6306_2.png) [@crAppAchic0](https://forums.speedlife.net/u/crAppAchic0)\ **Post date:** [April 12, 2008, 7:38am UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/4 "2008-04-12T07:38:54Z")
Good info- Congrats on figuring it out! ---
**Author:** ![tougethisDB1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/tougethisdb1/32/6358_2.png) [@tougethisDB1](https://forums.speedlife.net/u/tougethisDB1)\ **Post date:** [April 12, 2008, 7:56am UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/5 "2008-04-12T07:56:57Z")
time to go to honda or a junk yard bro. i think even advanceauto has them i used to work there. ---
**Author:** ![crAppAchic0](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/crappachic0/32/6306_2.png) [@crAppAchic0](https://forums.speedlife.net/u/crAppAchic0)\ **Post date:** [April 12, 2008, 8:14am UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/6 "2008-04-12T08:14:46Z")
> [@TougeThisDB1?!?](#): > > time to go to honda or a junk yard bro. i think even advanceauto has them i used to work there. Wait, what’s wrong with just desoldering and fixing the joint? Run to radio shack/whatnot, pick up some desoldering wick- clean it up and away you go… ---
**Author:** ![bennyfizzle](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bennyfizzle/32/6291_2.png) [@bennyfizzle](https://forums.speedlife.net/u/bennyfizzle)\ **Post date:** [April 12, 2008, 8:22am UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/7 "2008-04-12T08:22:49Z")
> [@TougeThisDB1?!?](#): > > time to go to honda or a junk yard bro. i think even advanceauto has them i used to work there. read the thread before posting, your post count isn’t that important. ---
**Author:** ![tougethisDB1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/tougethisdb1/32/6358_2.png) [@tougethisDB1](https://forums.speedlife.net/u/tougethisDB1)\ **Post date:** [April 12, 2008, 8:23am UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/8 "2008-04-12T08:23:48Z")
woopsies :🙂 i like how modified that into sounding like a douche. you should have just stayed with “read the thread man.” your awesome :idiots ---
**Author:** ![bennyfizzle](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bennyfizzle/32/6291_2.png) [@bennyfizzle](https://forums.speedlife.net/u/bennyfizzle)\ **Post date:** [April 12, 2008, 8:25am UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/9 "2008-04-12T08:25:23Z")
love you too ---
**Author:** ![bennyfizzle](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bennyfizzle/32/6291_2.png) [@bennyfizzle](https://forums.speedlife.net/u/bennyfizzle)\ **Post date:** [April 12, 2008, 8:26am UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/10 "2008-04-12T08:26:28Z")
oh, and christ youre quick on the reply, i edited that like 1.5 seconds after i posted. I’m an e-thug what can i say ---
**Author:** ![tougethisDB1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/tougethisdb1/32/6358_2.png) [@tougethisDB1](https://forums.speedlife.net/u/tougethisDB1)\ **Post date:** [April 12, 2008, 10:53am UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/11 "2008-04-12T10:53:37Z")
:lol it was just luck of the draw when i hit refresh when i checked it cause it said “someone has posted during your reply” or something. ---
**Author:** ![Mafdark](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mafdark/32/6322_2.png) [@Mafdark](https://forums.speedlife.net/u/Mafdark)\ **Post date:** [April 12, 2008, 4:51pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/12 "2008-04-12T16:51:53Z")
how did you narrow your problem down to the relay? I have having injector problems with my car and I cant find the problem but my trouble shooting is getting me closer and closer to the PGM relay… how did you know it was broke? ---
**Author:** ![Oleg](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/oleg/32/6276_2.png) [@Oleg](https://forums.speedlife.net/u/Oleg)\ **Post date:** [April 12, 2008, 4:58pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/13 "2008-04-12T16:58:33Z")
We were looking at the car last night, so the symptoms was it would crank, but wouldn’t start at all. Listened for the fuel pump (his seats are easy to remove) - nada. So it was either fuel or electrical. There are no fuses for the fuel pump, so the two main things left were the main relay or the pump itself. There is a test in the civic manual for bypassing the main relay to see if the pump works, and sure enough it did, so that pointed to the main relay. ---
**Author:** ![Mafdark](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mafdark/32/6322_2.png) [@Mafdark](https://forums.speedlife.net/u/Mafdark)\ **Post date:** [April 12, 2008, 5:16pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/14 "2008-04-12T17:16:49Z")
my fuel pump is going but not the injectors… main relay? ---
**Author:** ![Oleg](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/oleg/32/6276_2.png) [@Oleg](https://forums.speedlife.net/u/Oleg)\ **Post date:** [April 12, 2008, 5:21pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/15 "2008-04-12T17:21:41Z")
could be. what do you mean by “going”? what are the symptoms? ---
**Author:** ![Mafdark](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mafdark/32/6322_2.png) [@Mafdark](https://forums.speedlife.net/u/Mafdark)\ **Post date:** [April 12, 2008, 5:24pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/16 "2008-04-12T17:24:53Z")
Fuel at the rail, I can here the fuel pump prime and run as I turn the key. Code 16 “injectors” and I just triple checked my wiring for the resistor box. I checked every connection from the resistor box on. Spark is good Injectors are dry. ---
**Author:** ![Oleg](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/oleg/32/6276_2.png) [@Oleg](https://forums.speedlife.net/u/Oleg)\ **Post date:** [April 12, 2008, 5:34pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/17 "2008-04-12T17:34:11Z")
If the pump primes then it’s not the main relay, pump wouldn’t work with a busted one. Clogged fuel line maybe? ---
**Author:** ![Mafdark](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mafdark/32/6322_2.png) [@Mafdark](https://forums.speedlife.net/u/Mafdark)\ **Post date:** [April 12, 2008, 5:38pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/18 "2008-04-12T17:38:05Z")
nope, fuel at the rail. ---
**Author:** ![Oleg](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/oleg/32/6276_2.png) [@Oleg](https://forums.speedlife.net/u/Oleg)\ **Post date:** [April 12, 2008, 5:42pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/19 "2008-04-12T17:42:06Z")
Off the top of my head - no idea. But like I said, if the pump primes then your relay should be fine. Alex (Niskyspy) might have some idea when he checks the thread. ---
**Author:** ![Mafdark](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mafdark/32/6322_2.png) [@Mafdark](https://forums.speedlife.net/u/Mafdark)\ **Post date:** [April 12, 2008, 5:52pm UTC](https://forums.speedlife.net/t/stupid-honda-main-relays/236396/20 "2008-04-12T17:52:02Z")
hrm > This failure will result in a non-start, since closure of the first relay requires that the Battery circuit be grounded at Terminal 8, which won’t happen if Ignition power cannot make it to Terminal 2. Since the first relay stays open, the injectors will not get power. However, the fuel pump will get power while cranking, as the Start circuit will still be able to close the second relay. > This one should turn the Check Engine light on while cranking, with a Code 16 in pre-'96 cars, or a P0xxx code in post-'95 cars. Often misdiagnosed as bad injectors or a bad throttle body, because that’s what the Service Manual says Code 16 is. Honda apparently did not anticipate this problem. [Next page](https://forums.speedlife.net/t/stupid-honda-main-relays/236396.md?page=2)