Part Category
Heavy-Duty Truck Electrical Parts
Keep your Class 8 truck powered and reporting clean with heavy-duty truck electrical parts built for the road. This category covers the chassis and cab wiring components that keep starting, charging, lighting, and sensor circuits alive — sensors, switches, relays, solenoids, connectors, terminals, and harness hardware for hard-working diesel rigs.
Not sure which part fits your truck? We cross-reference OEM, competitor, and superseded numbers so you order the right component the first time. JAK'S Diesel ships in-stock parts same-day, with free freight on orders over $1,000. Call or text (720) 445-6249.
349
Parts Available
Showing 24 of 349 Heavy-Duty Truck Electrical Parts
Mack
2MS217M · 85129434
JAK'S JAKS-804127
JAK'S JAKS-804127
Available · Confirm Lead Time
$164.99
Mack
25159123 · 25195026
JAK'S JAKS-804124
JAK'S JAKS-804124
Available · Confirm Lead Time
$7.99
Mack
25171096 · 2MR2146
JAK'S JAKS-804123
JAK'S JAKS-804123
Available · Confirm Lead Time
$17.75
Mack
2MR2148M · 2MR2153M
JAK'S JAKS-804121
JAK'S JAKS-804121
Available · Confirm Lead Time
$12.43
Mack R MODELS
25011149 · 91MR124
JAK'S JAKS-804114
JAK'S JAKS-804114
Available · Confirm Lead Time
$29.33
Mack
88861354 · 4333-571691C1
JAK'S JAKS-804112
JAK'S JAKS-804112
Available · Confirm Lead Time
$3.99
Mack
11MR318M2 · 20378923
JAK'S JAKS-804106
JAK'S JAKS-804106
Available · Confirm Lead Time
$17.98
Mack
11MR318M · 25625640
JAK'S JAKS-804105
JAK'S JAKS-804105
Available · Confirm Lead Time
$32.20
Mack GU MODELS
21750459
JAK'S JAKS-804087
JAK'S JAKS-804087
Available · Confirm Lead Time
$259.39
Mack
11MR316M8 · 25625788
JAK'S JAKS-804085
JAK'S JAKS-804085
Available · Confirm Lead Time
$19.08
Mack
11MR316M7 · 25625491
JAK'S JAKS-804084
JAK'S JAKS-804084
Available · Confirm Lead Time
$22.58
Mack
11MR316M4 · 25624577
JAK'S JAKS-804082
JAK'S JAKS-804082
Available · Confirm Lead Time
$19.08
Mack
11MR316M3 · 25624556
JAK'S JAKS-804081
JAK'S JAKS-804081
Available · Confirm Lead Time
$19.08
Mack
11MR316M · 21666743
JAK'S JAKS-804080
JAK'S JAKS-804080
Available · Confirm Lead Time
$17.98
Mack MULTI
621-999587
JAK'S JAKS-803853
JAK'S JAKS-803853
Available · Confirm Lead Time
$130.99
Mack
25153310 · 302GC481
JAK'S JAKS-801110
JAK'S JAKS-801110
Available · Confirm Lead Time
$85.89
Mack FREIGHTLINER UNIVERSAL
A14-13495-005 · 621-999495
JAK'S JAKS-740265
JAK'S JAKS-740265
Available · Confirm Lead Time
$122.10
Mack
A14-13495-000 · 621-999490
JAK'S JAKS-740264
JAK'S JAKS-740264
Available · Confirm Lead Time
$112.03
Mack FREIGHTLINER UNIVERSAL
GRO01-4811-77 · 621-999177
JAK'S JAKS-740263
JAK'S JAKS-740263
Available · Confirm Lead Time
$113.89
Mack
A06-44025-000 · 621-999496
JAK'S JAKS-740262
JAK'S JAKS-740262
Available · Confirm Lead Time
$184.45
Mack FREIGHTLINER UNIVERSAL
A06-22743-002 · 621-999491
JAK'S JAKS-740261
JAK'S JAKS-740261
Available · Confirm Lead Time
$161.18
Choosing the Right Heavy-Duty Truck Electrical Parts
Heavy-duty diesel components must be matched to the exact engine and application. Before ordering from this collection, verify the part number, engine model, engine serial number, and any casting or calibration number shown on the original component.
Fitment information to have ready
- OEM, dealer, casting, or interchange part number
- Engine manufacturer, model, and engine serial number (ESN)
- Truck year and model when the component is chassis-specific
- Core details for remanufactured or exchange components
Need a fitment check?
Use the OEM cross-reference tool or text a clear photo of the part tag to (720) 445-6249. A JAK'S Diesel specialist can confirm the match before the part ships.
Can't Find the Right Part?
Text us the part number or a photo of the tag — we'll cross-reference it and quote you the right one.