How To Test Your Honda Main Relay

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Instructions

Remove the main relay.
Attach the battery positive terminal to the No. 4 terminal and the battery negative terminal to the No. 8 terminal of the main relay. Then check for continuity between the No. 5 terminal and No. 7 terminal of the main relay.
If there is continuity, go on to step 3.
If there is no continuity, replace the relay and retest.
Attach the battery positive terminal to the No. 5 terminal and the battery negative terminal to the No. 2 terminal of the main relay. Then check that there is continuity between the No. 1 terminal and No. 3 terminal of the main relay.
If there is continuity, go on to step 4.
If there is no continuity, replace the relay and retest.
Attach the battery positive terminal to the No. 3 terminal and battery negative terminal to the No. 8 terminal of the main relay. Then check that there is continuity between the No. 5 terminal and No. 7 terminal of the main relay.
If there is continuity, the relay is OK; If the fuel pump still does not work, keep testing down the wiring harness toward the fuel pump.
If there is no continuity, replace the relay and retest.

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Article Title:	How To Test Your Honda Main Relay

<table border="0" cellspacing="5" cellpadding="0" width="100%"> <tbody> <tr> <td style="HEIGHT: 20px" colspan="2"> </td> </tr> <tr> <td style="WIDTH: 1%"> </td> <td> <table border="0" cellspacing="0" cellpadding="0" width="100%" align="left"> <tbody> <tr> <td valign="top"><strong><font color="#e70000" face="Verdana">Tools</font></strong></td> </tr> <tr> <td> </td> </tr> </tbody> </table> </td> </tr> <tr> <td style="WIDTH: 1%"> </td> <td> <table border="0" cellspacing="0" cellpadding="0" width="100%" align="left"> <tbody> <tr> <td><strong><font color="#e70000" face="Verdana">Instructions</font></strong></td> </tr> <tr> <td>  <ol> <li>Remove the main relay. </li> <li>Attach the battery positive terminal to the No. 4 terminal and the battery negative terminal to the No. 8 terminal of the main relay. Then check for continuity between the No. 5 terminal and No. 7 terminal of the main relay. <br /> If there is continuity, go on to step 3. <br /> If there is no continuity, replace the relay and retest. </li> <li>Attach the battery positive terminal to the No. 5 terminal and the battery negative terminal to the No. 2 terminal of the main relay. Then check that there is continuity between the No. 1 terminal and No. 3 terminal of the main relay. <br /> If there is continuity, go on to step 4. <br /> If there is no continuity, replace the relay and retest. </li> <li>Attach the battery positive terminal to the No. 3 terminal and battery negative terminal to the No. 8 terminal of the main relay. Then check that there is continuity between the No. 5 terminal and No. 7 terminal of the main relay. <br /> If there is continuity, the relay is OK; If the fuel pump still does not work, keep testing down the wiring harness toward the fuel pump. <br /> If there is no continuity, replace the relay and retest. <!--/gc--></li> </ol> </td> </tr> </tbody> </table> </td> </tr> </tbody> </table>
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