Matt_Colie wrote:
Peter,
The part you are trying to diagnose may be stranger than you expect. It is a tall solenoid affair, then it is one of these and in lots of years, I have only seen one actually fail.
The trick is that it is not a Normally Open or Normally Closed type of contactor (electrician for BIG relay). It has two permanent magnets that will hold it either open or closed. The switch feeds it a pulse with the polarity one way for Open and a reversed polarity pulse for Close. So the switch is the same as the type for reversing a simple DC motor.
I will lay odds that the switch is failing. I have recovered these a few times (usually in power boat trim tab motor controls). If the switch can be removed without too much effort and you feel adventurous then get the switch loose and get someplace where you can take it apart. Be very careful at this stage because there are little springs and brass fingers that can attain escape velocity and then you have to buy a new switch. It will probably have lots of old hardened grease that is keeping one set of contacts from making good.
If you need to buy one, what you want is a DC reversing switch that is momentary both ways. It may say DPDT Mom On-Off-Mom On. I don't have
the catalog I want here so I can't give you a part number.
Matt
Matt, you are way off on your diag. Intellitec Relays are called Latching Relays. So named because they require NO POWER for either Open or Closed, hence no current draw when used or not used. I have 40 plus years as a Service tech and I have replaced upwards of hundreds of defective Intellitec solenoid relays. The SWITCH IF it causes the relay to "click" is NEVER at fault. RARELY have I ever had a defective wall relay switch. You reference Boat applications. I assume that is your main expertise. Well, I don't work on boats but have worked on RV's for 42 plus years. I stand by the fact it is the relay(Intellitec is the ONLY brand replacement you can use) for this application. Click the link to view the relay the Poster has. Notice the 2- 5 amp fuses. THOSE protect the wall switch panel. Doug
https://www.amazon.com/INTELLITEC-0100055000-Battery-Disconnect-Relay/dp/B072N8NYN2/ref=asc_df_B072N8NYN2/?tag=hyprod-20&linkCode=df0&hvadid=312455765168&hvpos=&hvnetw=g&hvrand=11485759525944937484&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9027230&hvtargid=pla-500871443515&psc=1