M1757
Active Member
Tested the alternator three times, it's perfect. The battery was pretty shot so I got a new one. Cables are all in good shape so guess I'll go over the truck real good and check every little thing.
strange occurance
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stamp11127
Full Access Members
Since you are in a salt environment during winter, corrosion is a big problem with electrical wiring if the salt water gets past the insulator. How do you know that your cables are in good shape - just on appearance or did you perform a voltage drop test?
M1757
Active Member
I just visually inspected the cables.
stamp11127
Full Access Members
This is one method I use to check wiring. You can't see the internal wire condition of a cable, so how do you know it isn't corroded inside? This test tells you. Max drop over the entire cable is .5v - From neg post to chassis and from pos post to starter, max is .5v drop (this is from our guidelines at my old job)
https://www.youtube.com/watch?v=3-9oZuX6-Pg
You use this procedure on any point in a harness. If you have a bad connection at the alt, this will tell you.
What is your charging voltage on the battery posts when engine is running? Use a dvm for this.
https://www.youtube.com/watch?v=3-9oZuX6-Pg
You use this procedure on any point in a harness. If you have a bad connection at the alt, this will tell you.
What is your charging voltage on the battery posts when engine is running? Use a dvm for this.
Last edited:
M1757
Active Member
On the fuse block under the dash I found the number two relay with the prongs burnt and the plastic housing slightly cracked. It's labeled "battery saver relay". It was clicking every few minutes.
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bedrck46
Guest
replace it clean all contact areas and use some dielectric grease on the contact area
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bedrck46
Guest
will have to look into why it is clicking could be the bad contacts or possible other issues keep us posted and if I find any other information I will let you know
can you see if you can get the numbers of the prongs that were burnt they may be on the side or bottom of the relay
can you see if you can get the numbers of the prongs that were burnt they may be on the side or bottom of the relay
M1757
Active Member
There are three portions in a row, the middle one was burnt. Another two prongs were in the opposite direction and the outer most one was burnt. The battery light cane back on for about 5sec then went out.
stamp11127
Full Access Members
Usually there are markings on the bottom of the relay with the number next to the connector or a diagram on one side.
I would expect 30 & 87 to show the overload.
I would expect 30 & 87 to show the overload.
M1757
Active Member
It's says on it PBT-GF20.
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