Testing relay boards...., Can you bench test a 914 relay board....??? |
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Testing relay boards...., Can you bench test a 914 relay board....??? |
second wind |
Feb 24 2022, 02:05 AM
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#1
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Senior Member Group: Members Posts: 857 Joined: 30-December 10 From: Los Angeles, California Member No.: 12,543 Region Association: Southern California |
Hello out there....my car has been dying after getting a good warm up but starts the next morning. The tell tale symptom is that the fuel pump does not run when the stall occurs and even after hours of cooling off it still does not start...but it does in the morning....???
So talk on the street is the relay board is too old to work properly.....the description of 914 LTD's improved and rebuilt relay boards matches the symptoms of my car perfectly so as soon as I scrap up the money I will buy one.....meanwhile I have two spare relay boards and one looks really good. Is there a way to bench test the relay board before I swap the boards ?? These cars sure keep you on your toes and a relay board with fresh soldered connections sure sounds appealing so Brad is holding one for me. So back to the swap out....I hate to go to the effort just to install another faulty board. Look forward and appreciate any and all comments and help....thank you very much!!!! gg |
Bartlett 914 |
Feb 24 2022, 04:53 PM
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#2
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Advanced Member Group: Members Posts: 2,216 Joined: 30-August 05 From: South Elgin IL Member No.: 4,707 Region Association: Upper MidWest |
A relay board has no electronics. It is a buss bar to relay and connector pins distributor. If it is intermittent than one or more of these connections is failing. The staking is very good and normally shouldn't fail but if the board is intermittent then the connection IS failing. Locating the connection and soldering it is the best solution. One problem using a DMM is the fact that the meter uses very small current. It can measure zero ohms and the connection can still be bad under load. What is needed is a higher current setup for "Ringing out" the connections. If your card is measured with a DMM as ok but you know there is a problem remaining in the board then one way to ring out the board is by using a voltage source and a light bulb. A light bulb using some power would be best. Maybe a headlight could be used. You need something with at least a couple of amps for testing.
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