Low Voltage

[6.4Ltony]

I was driving for a fishing trip last thurs and checked "Vbatt" on the DashDaq and to make a long story short for the last 1200 miles (at least) it has read between 9.5 and 10.2 volts. Batteries have green showing on the top. I pulled one batt and hooked it to a charger and it wasn't dead. I did the system check on the dash and it says " Charging system OK". The DashDaq has no codes. All lights, radio, etc... work fine. Truck starts w/ no trouble. The only issue I have seen is that I can't change tunes, the DashDaq says "system voltage too low" or something to that effect. Any help/advice would be appreciated.

Thanks.

 

[Dzchey21]

With that low of voltage the truck shouldn't start, you should have a battery light on the dash almost instantly, and the system check should say something about it. I have never seen it before but i'm betting there is an issue with the dash daq. What I would do is use a multimeter to check actual batter voltage. i'm thinking you will fund closer to 12.7 v not running and about 14.3 running. Have you tried unhooking the dashdaq and plugging it back in? Check voltage under obd generic and ford specific.

 

[6.4Ltony]

thanks for the reply.
I checked voltage on both the "c" and "d" analog input pages on the dashdaq. They read the same. I have unplugged and replugged and no change. There is no battery light and the battery gauge on the gauge cluster shows normal battery charge. I have seen the DashDaq read 14v, in the past.

 

[Dzchey21]

I would say there is something wrong with the dashdaq. I would confirm good voltage with a multimeter first but from the sounds of it that's the issue. You might contact Spartan about it and see of they have ever ran into anything else.like that before

 

[6.4Ltony]

Drivers battery 752CCA
Passenger battery 786CCA

System tested @ 13.3V @ idle w/ load.

 

[Dzchey21]

Dashdaq is no good would be my guess

 

[6.4Ltony]

thanks again for your input.
I have posted @ Spartan and emailed Drew Tech. Nothing has changed on my truck recently and I don't know how long it has been reading 10V, since I haven't checked VBATT in a month or so anyways. DashDaq works fine otherwise which is strange.

 

[DMDP]

Mine has done this twice since I've owned it! But it goes back to normal after a few minutes. All the lights go dim and my radar detector starts beeping and says low voltage on it. Hasn't done it for a few months now tho ???

 

[cory151]

First thing Id do is load test the batteries, I found I had one of mine giving up the ghost after 100k so I replaced both of them.

 

[6.4Ltony]

just ended up being a FUBAR DashDaq for no good reason. Sent it in for a BENJAMIN and got it fixed. Put 2 new Yellow Top Optima's in for no reason (other than they look cool).