Difference between revisions of "Main Relay"

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<p>If the Main Relay is the problem, it is nearly always a problem internally with some of the soldered connections between the relay and the circuit board.  You may or may not be able to see the hair-line cracks in the solder connection but flexing the circuit board will sometimes make it more visible.  For those that are adept with a soldering iron, many people have successfully just heated up the solder connection and re-flowed the solder on each lead using either rosin core solder or just soldering flux.  However, the Main Relay is not a particularly expensive part (39400-SL0-003 is the part number for the US 1991 part) and is a relatively straight-forward DIY project, so many people just replace them.  </p>
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<p>If the Main Relay is the problem, it is nearly always a problem internally with some of the soldered connections between the relay and the circuit board.  You may or may not be able to see the hair-line cracks in the solder connection but flexing the circuit board will sometimes make it more visible.  For those that are adept with a soldering iron, many people have successfully just heated up the solder connection and re-flowed the solder on each lead using either rosin core solder or just soldering flux.  However, the Main Relay is not a particularly expensive part (39400-SL0-'''003''' is the part number for the US 1991 part and 39400-SL0-'''A01''' is the part number for '95-05) and is a relatively straight-forward DIY project, so many people just replace them.  </p>
 
<h3>Where is the Main Relay Located?</h3>
 
<h3>Where is the Main Relay Located?</h3>
 
<p>The Main Relay is located behind the panels that are on the bulkhead behind the passenger seat.  The main relay is next to the ECU but it can be on either side of it and it's not clear if the placement is determined by the year or by the model.  In the early years it should be on the drivers side of the ECU and its a small square black box that says "Relay Ass'y Main" with 2 plugs going into it.  In later years (or perhaps NSX-T models), its on the other side (door side) of the ECU and reverse mounted facing the firewall.</p>
 
<p>The Main Relay is located behind the panels that are on the bulkhead behind the passenger seat.  The main relay is next to the ECU but it can be on either side of it and it's not clear if the placement is determined by the year or by the model.  In the early years it should be on the drivers side of the ECU and its a small square black box that says "Relay Ass'y Main" with 2 plugs going into it.  In later years (or perhaps NSX-T models), its on the other side (door side) of the ECU and reverse mounted facing the firewall.</p>

Latest revision as of 01:41, 26 March 2012

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