Ok just for anyone else out there having this issue with your speedometer I had to send it out and have it repaired apparently this is a issue with a lot of different instrument clusters but this was my CLUSTER/SPEEDOMETER number 3C3F10849MA they had to replace some internal parts but now is working again like it should and at a great price. If you want more info contact me

⟐ Comment deleted May 24, 2020 at 10:50 MST

⟐ Answer accepted March 04, 2018 at 11:32 MST

(3) What is the best way to troubleshoot the problem? I suspect if it is not a blown fuse (possibly in-line fuse ??), the motor may be dead. If it is the motor, (4) where might I find one online for a reasonable price?

Thanks in advance for your advice. JK in SA

⟐ Answer deleted October 06, 2020 at 1:05 MST

2001 National Surf Side 3311 motorhome. It’s on a Ford chassis.
Ford V10 Engine, Ford gauges, etc.

Near as I can tell it has a 3G Ford alternator.

While driving, the voltage gauge on the dash shows ~8V and doesn’t move much up or down. Every other gauge functions as normal (oil pressure, engine temp, tach, speedo, etc).

Testing with a good Fluke multimeter: At the battery it’s showing 12.6V while sitting and showing ~14V while running (so I assume alternator is charging).
At the alternator, I have 4 wires:

4 gauge black/red that shows constant 12V

Then a 3 pin plug that has the following wires:

Red/lt blue with 12V constant

Lt green/red with 13+V when engine is running

Brown/black wire with 7.3V when engine is running (this wire comes out of the 3 pin plug and goes back into a single pin plug that’s also on the alternator, it doesn’t go anywhere else.)

My question is should the brown/black wire show a higher voltage? If the battery is charging then what would cause a low voltage on the gauge? I am assuming the voltage regulator attached to the alternator is bad but thought I’d check here first before just buying parts. Thanks in advance.

⟐ Answered February 17, 2025 at 17:22 MST

Bowen g6a2 . Can anyone please help. I also have no working dash gadges. Im new to this and not enough money to take to repair shop to have them do it. So its time for me to learn. And no one has repair books for a rv this old. Help!!!!!!!

⟐ Answered November 12, 2019 at 10:33 MST

New this month! OUCH $500 each even though interstate charges direct customers $399.! 4 trips 8 man hours just shuttling! Went a couple of times to pick up our vehicle, ..not fixed.

We hadn't t used it much with the original batteries however. We thought the problem was the coach batteries. Went to Winnebago approved service center, had them replaced. Same issues. We know 50% is the max amp hours we can get out of the AGM batteries. If we turn anything on for less than a minute or 2 things go sideways!

BTW. Had our old batteries load tested after they were removed and they are good.

When we turn on the refrig with a fully charged battery bank the refrig makes too much noise. the Zamp controller shows 11 ish volts. (great NOVAKOOL refrig... very quiet and never a problem with it. Equivalent of less than 40w bulb) If we are on shore power, it is very quiet and works fine.

Something seems to be amiss.... Grounding? short?

If we turn on 3 led lights at the same time - reading is 11 ish or below (FULLY CHARGED)

After attempting "approved service centers" we are starting to understand that we have to figure it out!

Have taken a few trouble shooting steps. Want to take more, so am reaching out here to see if anyone is familiar with this particular vehicle.

I think we have been the experiment.... newer models have nifty things like a solar shut off switch (we have to unplug solar on the roof if we don't want the panels feeding in). Newer models have % of charge monitors for the batteries. Our model has the zamp controller, and a "one place" that shows Volts.

Lots of folks are ripping out brand new systems in these to put lithium batteries in.

Newer models come with Lithium batteries. We hear they have their own set of issues. For me ... there is NO WAY I want to sleep above a bank of batteries.

We need help and hand holding taking the troubleshooting one step at a time.WB TABLE OF CONTENTS Electrical

⟐ Commented December 08, 2024 at 16:40 MST

⟐ Answered September 29, 2019 at 1:55 MST

⟐ Answer accepted September 27, 2018 at 4:57 MST