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Quad Relay Repair by Norman

How to do all those tricky XJ40 repairs
j_r
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Quad Relay Repair by Norman

Postby j_r » Thu Jul 11, 2013 9:18 pm

For some reason, quad relay DBC10009 seems to fail often and there also appears to be a shortage of replacement units as they pop up very rarely on the bay. This unit serves

“Auxiliary positive”, Sidelight positive”, Auxiliary sidelight” and “Cigar lighter”

However, there is a simple solution to this problem. The other quad relays can be had on the bay for a few quid and their internals can be easily cannibalised to repair a failing DBC10009. (or any other quad relay for that matter)

The DBC10009 looks like this inside.

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A DBC10193 for example, looks like this inside.

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The relays, resistors and diodes used in each unit are the same and any malfunctioning component from one can be replaced by one from the other.

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The soldered components, however, need to be de-soldered and to do this you need a special tool, a de-solderer or solder sucker, pictured below. Just heat the joint with a soldering iron and when it is nice and molten suck the solder into the spring loaded de-solderer. The component can then be prised loose to be used on the other quad board.

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