Rustygears
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I guess I have a heck of a lot of luck for a lot of years. Leaving the headlights on for a constant load helps avoid spikes. Spikes come from transient loads.
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Hey thanks, Is for sure the relay. No fire to starter. But Erick's is out of supply. But got one on eBay nos new he says. It looks a little tarnished so it better work. By the looks of my old relay it looks like you can take it apart. Also it still works but about 70% of the time so will save it for spare when desperate. Is it possible to clean the contact bar on this thing. Oh payed 120 better than being somewhere and break down . Butt thank you for the safety notes .DC current dangerous thing. Thank you.Erik's Military Surplus has them for $90.00 http://www.eriksmilitarysurplus.com/vehicle-electrical-parts.html. The starter relay on a M35A3 is the same as on a M35A2. However, are you certain that you have a faulty starter relay? Have you confirmed that the starter relay is faulty? As I mentioned in PMs, your problem could also be a faulty starter solenoid, a faulty starter or a poor cable connection. Make sure you disconnect the negative battery cable before working on the starter relay or starter as some of the cables are hot, even with the master off.
Batteries 100 percent.check batterys low voltage will cook your relay
Just to clarify, you bought two brand new batteries, installed them in your truck, and you haven't charged (or overcharged) them at all? Do they each read 19V when disconnected from the truck? 38V is way too much. Fresh 12V batteries wired in series should give you ~26V, read on a reliable voltmeter.Today I put a volt meter on my batteries. Each is showing 19v and the combined 24v reading (neg post of back battery and pos post of front), it is reading 38v. When I go into the truck and read the two power wires (11), they are showing 38v. Any ideas on why my batteries would both be reading so high? Truck isn’t running.
On my Aux switch (I tried 2 and got same results with both), when I have all 4 plugs hooked up (both 11s, 27-400 and 27) to the back, I only get a few gauges that move when I turn the switch on. When I unplug plug 27 but leave 27-400, all of the other guages respond (for example the Volt guage). Its like it won't power all guages with both plugged in, but just one at a time (27 or 27-400). Any ideas to why? I did test continuity on the switches and they appear to be functioning correctly (both power to accessory plugs).Just to clarify, you bought two brand new batteries, installed them in your truck, and you haven't charged (or overcharged) them at all? Do they each read 19V when disconnected from the truck? 38V is way too much. Fresh 12V batteries wired in series should give you ~26V, read on a reliable voltmeter.
With new meter, each battery is measuring 12.8v and 25.6v together. I’m also getting 25.6v to both of the 11 plugs at the aux switch.Correct, 2 new batteries from Walmart. I just went outside to my F150 (which I know is good) and put the meter on it. It is reading 19.5v, which tells me my meter is no good. I'll get another meter and retest, but hopefully that tells me the batteries in the m35 are not the problem.
Today's testing... On my Aux switch (I tried 2 and got same results with both), when I have all 4 plugs hooked up (both 11s, 27-400 and 27) to the back, I only get a few gauges that move when I turn the switch on. When I unplug plug 27 but leave 27-400, all of the other guages respond (for example the Volt guage). Its like it won't power all guages with both plugged in, but just one at a time (27 or 27-400). Any ideas to why? I did test continuity on the switches and they appear to be functioning correctly (both power to accessory plugs).
If you are uncertain whether or not you have hooked up all four wires correctly on the Battery Accessory Switch, check the electrical schematic in TM 9-2320-386-24-1-2. It will show you which wire numbers go to which contact on the switch. I have a question. Why did you replace the switch? Why did you think it needed replacement? I'm assuming here that your A3 started and ran fine prior to replacing the batteries and Battery Accessory Switch?Correct, 2 new batteries from Walmart. I just went outside to my F150 (which I know is good) and put the meter on it. It is reading 19.5v, which tells me my meter is no good. I'll get another meter and retest, but hopefully that tells me the batteries in the m35 are not the problem.
Today's testing... On my Aux switch (I tried 2 and got same results with both), when I have all 4 plugs hooked up (both 11s, 27-400 and 27) to the back, I only get a few gauges that move when I turn the switch on. When I unplug plug 27 but leave 27-400, all of the other guages respond (for example the Volt guage). Its like it won't power all guages with both plugged in, but just one at a time (27 or 27-400). Any ideas to why? I did test continuity on the switches and they appear to be functioning correctly (both power to accessory plugs).
Thanks for the response. I checked the schematics, and I have the 4 wires hooked up correctly to the Aux switch. I'm getting correct voltage to the 2x power wires (11) on the Aux switch. I've tested the switch, and it appears to be getting proper voltage from ports A-B and C-D (B and D ports are getting proper voltage with Aux switch turned on).If you are uncertain whether or not you have hooked up all four wires correctly on the Battery Accessory Switch, check the electrical schematic in TM 9-2320-386-24-1-2. It will show you which wire numbers go to which contact on the switch. I have a question. Why did you replace the switch? Why did you think it needed replacement? I'm assuming here that your A3 started and ran fine prior to replacing the batteries and Battery Accessory Switch?